Tag: Excel

Methodology

Create a Master Genealogy Research Plan in Excel

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Are you juggling multiple research plans and struggling to see the big picture of your family history research? If you’ve been using separate plans for each family group or project, you might be missing opportunities to work more strategically.

A master genealogy research plan consolidates all your research into a single, comprehensive Excel workbook. This approach gives you an overview of your entire research landscape, helps you identify gaps and priorities, and makes it easier to plan your next steps efficiently.

In my article How to Create a Research Plan in Excel, I showed you how to develop individual research plans for each family group. That method works well, you might find you need a broader perspective to research strategically. A master plan addresses this need by bringing everything together in one place.

What is a Research Plan and What are the Benefits?

A genealogy research plan identifies:

  • the questions that you want to answer
  • the hypotheses you want to test
  • the information that you need, and
  • the tasks you need to undertake.

Use your research plan to track your progress, pick up where you left off, record the sources used and document a summary of your findings. A research plan supplements the main documentation in your family history software or online family tree.

Why Create a Master Plan?

Having multiple research plans worked for me for many years. But it became difficult to plan my family history research as a whole. I needed a way to get an overview of my entire research, identify gaps and priorities, and work strategically across all my family lines.

Previously, I developed various separate tools for these purposes: a research index, the Tree Health Assessment Tool, and a BDM index to track birth, death and marriage records. While these tools were helpful, they created their own management challenges.

The alternative approach is to combine these tools into a single master plan. Having one plan keeps all your information together. You’re less likely to lose documents or information, and you can work more strategically. It’s also easier to take your plan with you when you go out to research.

I currently use Notion for my master plan, but I want to demonstrate how you can create a master plan in Excel for those who prefer spreadsheets or don’t use Notion.

How to Structure Your Master Genealogy Research Plan

This master plan uses six worksheets, each with a specific function. Keeping related information together in one workbook aids planning and prevents information from getting scattered across multiple files.

Sheet 1: Research Index

The research index provides a summary of key research questions or status for each family group in your tree.

Excel columns are designed for filtering, so separate your data based on how you might want to filter it.

Column setup:

  • Column A — Family. List family groups using the surnames of both spouses. Each row represents a different family group.
  • Column B — Grandparent line. Assign each family group to one of your four grandparent lines. Use your grandparents’ surnames. Mine are: Everett (father’s father), Flanagan (father’s mother), Hend (mother’s father) and Rusten (mother’s mother).
  • Column C — Generation. Assign each family group to their generation. You are generation 1, your parents are 2, your grandparents are 3, and so on (see sheet 6).
  • Column D — ID. Add unique identifier numbers for the couples. I use the RIN from my family history software.
  • Column E — Key research questions or status. Add the most important research question for that family group. You don’t need content for every family group. Update this regularly as your research progresses.
  • Column F — Rating. Assign a complexity rating to the research required. This helps you choose which family to work on based on available time. See the key on Sheet 6.

Filtering example: To see all family groups on just one grandparent line, filter Column B for that grandparent’s surname.

Sheet 2: Evidence

This sheet stores the table format of your Tree Health Assessment. It provides a summary of evidence strength for key information or events for each family group.

This assessment helps you identify where your research foundation is strongest and where it needs reinforcement. For instructions on creating this assessment, see my article How to Apply the Family Tree Health Assessment Tool.

Extract from a sample Tree Health Assessment Table in Excel, with rows for family groups and columns indicating the strength of evidence for key facts and events
Extract from a sample Tree Health Assessment Table

Sheet 3: Plan and Log

This is the main sheet containing all your research questions, hypotheses and tasks.

Column setup:

  • Column A — Grandparent line. Use your four grandparents’ surnames.
  • Column B — Generation. Assign each question, hypothesis or task to the relevant generation.
  • Column C — ID. Add unique identifier numbers for the person(s) relevant to the question, hypothesis or task.
  • Column D — Surname. Insert the surname of the person relevant to the question, hypothesis or task.
  • Column E — Ref. no. Assign a unique number to each question, hypothesis or task. Tasks attach to either a question or hypothesis as sub-numbers. Add the first letter of the grandparent line to the number, and restart numbering for each grandparent line.
  • Column F — Your research question, hypothesis or task. Write the question, hypothesis or task in this column.
  • Column G — Category. Categorise as question, hypothesis or task.
  • Column H — Status. Open (O) or Closed (C).
  • Column I — Sources to examine & repositories
  • Column J — Sources used & citation
  • Column K — Notes
  • Column L — Analysis
  • Column M — Transcript or extract
Extract from a sample master genealogy research plan in Excel, sheet 3, demonstrating columns A-H
Extract from a sample master genealogy research plan, sheet 3, demonstrating columns A-H

If you wish, you can add more columns for information that might assist your research planning. For example, you could add a column for country and then filter all research for that location. Or add a column for subjects such as convicts or immigration to group related research topics together.

Sheet 4: Surnames

In my article Create a Surname Tree to Organise Your Family History, I showed how to create a tree providing an overview of surnames in your family tree and which line they belong to. This serves as a useful research tool.

On this sheet, either insert an image of your surname tree or create a table version instead.

a table with a column for each grandparent line, listing the surnames that appear on that line
Example surname table, by grandparent line

Sheet 5: BDM Index

In my article Using Excel to Track Birth, Death and Marriage Records, I demonstrated a spreadsheet for tracking vital records you need and those you’ve already obtained. This index helps you plan and prioritise record purchases while ensuring you don’t waste money on duplicates.

Add this index to Sheet 5 of your master plan to keep all your planning tools in one place.

Sheet 6: Key

Use this sheet to list explanations, abbreviations and keys for your other sheets.

Research complexity ratings for Sheet 1:

  • 1 Significant research question or problem
  • 2 Needs research to progress further or relationships not proven
  • 3 Needs research but only to tidy things up. Not essential to progress further
  • 0 No work currently needed. All relationships sufficiently proven
  • 4 Previous generations need to be proven first

Generation key:

  • 1 me
  • 2 parents
  • 3 grandparents
  • 4 great grandparents
  • 5 2x great grandparents
  • 6 3x great grandparents
  • 7 4x great grandparents
  • 8 5x great grandparents
  • 9 6x great grandparents
  • 10 7x great grandparents
  • 11 8x great grandparents

Tree Health Assessment colours for Sheet 2:

  • Green: Strong evidence
  • Yellow: Some evidence, insufficient
  • Red: No evidence or not researched
  • Grey: Not applicable

Working Strategically With Your Master Plan

The power of a master plan lies in its ability to help you work strategically across your entire family history. Use the filtering features to do things such as:

  • Focus on one grandparent line at a time
  • Identify all open research tasks across your tree
  • Find families with brick wall problems based on complexity ratings
  • Plan research trips by filtering for specific locations or repositories.

The interconnected nature of the sheets means you can move between high-level planning (Sheet 1) and detailed research tracking (Sheet 3), while keeping supporting tools like your BDM index readily accessible.

Try a Master Genealogy Research Plan

A master genealogy research plan helps you coordinate your research and work more systematically. By consolidating your planning tools into a single Excel workbook, you gain the overview needed to make informed decisions about where to focus your research time and energy.

Start by setting up the six sheets outlined above, then gradually migrate your existing research questions and tasks into the master plan format. You don’t need to complete everything at once and you don’t need to include everyone who is in your family tree. Build your master plan incrementally as you work on different family lines.

For more articles and information about using Excel in family history, head to the Excel page. You can also download your free copies of my Excel guides on my Free Stuff page. A guide about this master plan (with examples) will be available for download soon.

About the Author

Danielle Lautrec is a genealogy educator, researcher, and author of The Good Genealogist. With qualifications in history, family history, and historical archaeology, she teaches for the Society of Australian Genealogists.

Advice, Methodology

Complex Genealogy Timelines with AI

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Creating simple genealogy timelines with AI works well, but family history research often requires more complex approaches. You need timelines spanning multiple generations, combining different family groups, or analysing extensive descendancy data.

My experiments with complex genealogy timelines revealed significant differences between AI tools. Some handle complexity brilliantly, while others fail completely. This post shares my findings and shows you how to create useful complex timelines for research planning and problem-solving.

Quick Recap: Where We Left Off

In my previous post, I showed you how AI can create simple timelines for individuals and their immediate families. The key findings were:

  • Format matters: Structured reports from family history software work better than web-based PDFs as input data
  • Instructions are crucial: Clear prompts minimise common interpretation errors
  • Quality varies by tool: Different AI tools have different strengths and weaknesses.

For simple timelines, all three tested tools (ChatGPT 4o, Google Gemini 2.0, and Claude Sonnet) performed well with properly formatted data. But complexity changes everything.

Why Complex Timelines Matter

Complex genealogy timelines serve different research purposes than simple ones:

  • Multi-generational analysis: Track family patterns across time and place
  • Problem-solving: Identify inconsistencies, conflicts and gaps in your research or the data
  • Research planning: Visualise what you know versus what you need to find
  • Family group studies: Understand relationships between families.

The timelines available in online family trees and family history software are limited. You get basic birth-death information, usually in PDF format only. For serious research, you need customisable timelines with complete event data in editable formats.

My Systematic Testing Approach

I needed to understand where each AI tool reaches its limits. My goal was finding a process that generates accurate timelines efficiently, without a lot of error correction.

I tested increasingly complex document formats to identify the breaking point where AI makes too many mistakes. When a tool struggled, I tried alternative approaches to see if different methods resolved the problems.

AI Tools Tested:

  • ChatGPT 4o (paid)
  • Google Gemini 2.0 (free)
  • Claude Sonnet (paid)

Document Formats Tested:

  • Family tree chart: Legacy Family Tree PDF, five generations, 28 people
  • Medium complexity report: Legacy descendancy report PDF, 11 pages, 3 generations, 47 people, 159 events
  • High complexity report: Legacy descendancy report PDF, 15 pages, 3 generations, 238 people, 249 events

I used the same prompt from my simple timeline experiments, with modifications based on those findings. I added a unique identifier column to distinguish between people of the same name. And I provided specific guidance for interpreting residence events, as errors were common for this event type.

Results: The Complexity Breaking Point

Document TypeChatGPT 4oGoogle GeminiClaude Sonnet
Family tree chart PDFFailedFailedFailed
Medium complexity reportVariable results100% success100% success
High complexity reportFailed100% success90% success

Family Tree Charts: Universal Failure

Family tree charts in PDF format proved impossible for all three tools. ChatGPT extracted no usable data. Gemini and Claude extracted some correct information but omitted people, missed events, and included incorrect data.

Even when I provided examples of correct interpretations, Claude couldn’t apply those examples consistently across the chart. The visual layout and graphical elements appear to make these documents unsuitable for AI timeline creation. However, I will be conducting more tests as it would be particularly useful if successful.

extract of a family tree chart showing seven individuals across three generations
Family tree charts are difficult for AI to interpret accurately

Medium Complexity: Clear Winners Emerge

This is where tool differences became apparent:

ChatGPT produced variable results. It managed one 2-generation, 9-page report successfully but omitted residence events. Other similar reports contained numerous errors, making results unreliable.

Gemini and Claude both produced high-quality timelines consistently. Gemini included some unrequested event types, but the core timeline data was accurate.

High Complexity: The Real Test

ChatGPT struggled even when I broke complex reports into smaller parts, feeding it one generation at a time. The error rate remained unacceptably high for research purposes.

Gemini maintained 100% success rate even with the most complex documents, though it sometimes included event types not requested in the prompt.

Claude achieved 90% success rate. It occasionally missed events but responded well to correction prompts, fixing errors when they were pointed out.

extract from a genealogy timeline showing events that were not requested for inclusioin
Gemini added event types that were not requested, which is not as bad as omitting events, but not ideal.

Common Problems and Solutions

Understand Error Patterns

Errors often follow discernible patterns. In my experiments these included:

  • All events before a certain year omitted
  • All marriages excluded
  • Data appearing in wrong columns when locations weren’t specified
  • Events omitted when separated from names by page breaks.

Identifying these patterns helps you prompt AI for specific corrections and may help you improve the data input for future situations.

Input Data Issues

Sometimes the problem isn’t AI interpretation but your source data. I discovered Legacy Family Tree had started omitting marriage dates from reports, which explained why both Claude and Gemini excluded these events. Always verify your input data quality first.

Quality Control Strategy

Check AI output systematically:

  1. Download the timeline into Excel
  2. Apply filters by person’s name
  3. Review events for each individual separately
  4. Look for obvious gaps or inconsistencies.

If quality control takes excessive time, the AI tool isn’t worth using. High error rates defeat the time-saving purpose.

Optimising Your Approach

Adjust Your Prompting

For complex timelines, I made these prompt modifications:

  • Added unique identifier column requirements
  • Provided specific residence event interpretation guidance
  • Included examples of correct date handling for approximate dates.

When asking for error corrections, describe the problem and provide 1-2 specific examples. If AI struggles, ask it to explain the difficulty and discuss alternative approaches.

Find the Complexity Sweet Spot

More data doesn’t always mean better results. Increasing complexity can increase error rates and processing time, negating time savings.

My testing for these data formats suggests the complexity limit lies around 160-250 events. Beyond this, error rates increase significantly. Gemini handles higher complexity better than the other tools, but I wouldn’t exceed 250 events in a single request.

Optimisation strategies:

  • Exclude unnecessary data (such as indexes)
  • Break very large datasets into logical chunks
  • Focus on event types that are essential for your research objectives.

Format Considerations

  • Text-based PDFs work best: Structured reports from family history software
  • Avoid image-based documents: Family tree charts, scanned documents
  • Consistent formatting helps: Improve data entry in your family tree.

Practical Recommendations

For medium complexity projects (under 160 events): Gemini or Claude both work well. Choose based on your preferences.

For high complexity projects (160-250 events): Gemini shows superior performance, but Claude works well with careful quality control.

Avoid ChatGPT for complex genealogy timelines. Its inconsistent performance makes it unsuitable for research purposes.

Always prepare fallback approaches: If your preferred tool struggles with specific data, try alternative formatting or different tools.

What This Means for Your Research

AI can definitely accelerate complex timeline creation, but success requires:

  1. Realistic expectations: Understand your chosen tool’s limitations
  2. Proper preparation: Use structured, text-based input data
  3. Strategic complexity management: Stay within the 160-250 event range (or 11-15 A4 pages)
  4. Systematic quality control: Check results methodically.

Complex AI-generated timelines can support your family history research, but they’re not magic solutions. They require the same critical thinking and verification you’d apply to any research tool.

Looking Ahead

My experiments continue, focusing on:

  • Including source citations in AI-generated timelines
  • Using timelines for specific genealogical problem-solving scenarios
  • Optimising prompts for different research purposes.

In another post, I’ll explore real-world case studies using AI timelines to solve specific genealogical problems.

The key takeaway: AI can handle complex genealogy timelines effectively, but tool selection and proper preparation determine success.

If you’re not already using family history software, Legacy Family Tree is free.

If you want to learn more about using timelines in genealogy, start with this post: Use Genealogy Timelines to Organise, Analyse and Improve Your Research.

About the Author

Danielle Lautrec is a genealogy educator, researcher, and author of The Good Genealogist. With qualifications in history, family history, and historical archaeology, she teaches for the Society of Australian Genealogists.

Advice, Methodology

Create a Genealogy Timeline with AI: Getting Started

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Timelines are essential in family history research, but creating them manually is time-consuming. You need to gather data, enter it into tables, and organise everything chronologically.

AI can help with this process. It extracts data from your family history documents, analyses it, creates tables, and orders events by date.

I’ve tested this approach to discover what works and what doesn’t. This post shares my findings and shows you how to get started with simple genealogy timelines. Later posts will examine more complex timelines for research problem solving and discuss in more detail how to optimise the prompt and input data for best results.

Why Use Genealogy Timelines

Timelines place people in time and space. They help you:

  • Clarify identities and solve research problems
  • Expose gaps and inconsistencies in your data
  • Organise information for better research planning
  • Create engaging family narratives.

If you’re not using timelines yet, read my article Use Genealogy Timelines to Organise, Analyse and Improve Your Research for a discussion of the benefits and uses for genealogy timelines.

The Timeline Problem

Online family trees and family history software create limited timelines. You might get a timeline for one person with their immediate family, but events for the family are limited to birth and death. The format is usually PDF-only, which means no editing in Excel.

This limits their value for family history research. You have limited control over what data gets included and can’t make adjustments afterward.

Creating custom timelines manually means extracting data from your software, entering it into spreadsheets, and organising it chronologically. It’s tedious work that’s prone to errors.

What AI Can Do for Timeline Creation

AI excels at three key tasks:

  1. Extract data from documents and format it into tables
  2. Organise events chronologically to create proper timelines
  3. Convert results into Excel-compatible formats.

AI can also provide historical context and suggest research directions, but I’ll focus on the core timeline creation process here.

Before You Start: Essential Preparation

Protect Privacy First

Always exclude living people from any data you share with AI tools. Check your software settings and review reports to ensure no personal information about yourself or living relatives gets included.

In Legacy Family Tree, you can suppress the names of living people or exclude them totally.

Decide Your Timeline Content and Format

Consider what information you need:

  • Dates: Full dates or years only? How should approximate dates (abt. 1832) or spans (1841-1844) be handled?
  • Events: Birth, death, marriage are standard, but baptism and burial are useful too. Include residence, or occupation events?
  • Names: Full names in one column or separate surname column?
  • Locations: Complete location in one column or split into separate columns?
  • Citations: Useful, but I left them out in these simple timelines.

I also recommend including a unique identifier column to distinguish between people with the same name.

For more tips on genealogy timelines, see my article Excel Genealogy Timelines: Complete How To Guide.

Testing Different AI Tools and Formats

I tested three AI tools with different document formats:

AI Tools Tested:

  • ChatGPT 4o (paid)
  • Google Gemini 2.0 (free)
  • Claude Sonnet (paid)

Document Formats Tested:

  • Ancestry individual profiles (PDF and text)
  • Legacy Family Tree individual reports (PDF)
  • Legacy Family Tree family group sheets (PDF)

The Prompt That Works

Here’s the prompt I developed through testing:

‘Please extract all birth, baptism, marriage, death, burial, and residence events from the following report. Include only events where dates and locations are explicitly stated – no assumptions. Present results in a table with four columns: Date, Type of Event, Location, and Name of the Person. Sort chronologically by date. Omit any index or row numbers. If a date is approximate (e.g. ‘Abt.’, ‘Bef.’, ‘After’), retain the original text but sort chronologically based on interpreted value.’

For software-generated reports with unique identifiers, I added:

‘Please add another column called RIN. This is the unique identifier number for a person. You will find that number in square brackets after a person’s name. Add the RIN for each person in this new column.’

Results: What Worked and What Didn’t

Document TypeChatGPT 4oGoogle GeminiClaude Sonnet
Ancestry Individual profile PDFFailed100% Success100% Success
Ancestry Individual profile Text100% SuccessNot testedNot tested
Legacy Individual profile PDF100% Success100% Success100% Success
Legacy Family Sheet PDF100% Success100% Success100% Success

Key Findings:

Format matters. Image-based PDF documents and PDF documents from web pages (like Ancestry) can be problematic. They can be difficult to search; have overlapping elements or graphics; and may include OCR (Optical Character Recognition) text that is less accurate. ChatGPT struggled with these and could only interpret the data when it was converted to text format by copying and pasting.

John Beaumont has a great video about PDF issues and AI, if you need to know more.

Structure helps. Reports from family history software work best because they’re already consistently formatted.

Instructions are crucial. AI tools interpreted standard events (birth, death, marriage) accurately but needed guidance with residence events that appeared in different formats.

Example additional guidance provided:

‘You have not listed any residence events. I think you had trouble because they have been expressed in a few different ways. There are events in the document that say ‘resided at [address] in [year] in [location]’; others say ‘had a residence in [year] in [location]’. Can you see if you can extract those ones and add them to the timeline?’

Google Gemini performed particularly well, correctly interpreting events as residence events even where the word residence was not mentioned. For example, it assumed that a religion event with a date and location indicated residence.

Quality Control: Review Your Results

Always check AI-generated timelines, even when they look perfect. Common issues include:

  • Minor errors: Events slightly out of chronological order
  • Major errors: Missing events, wrong people, or invented information.
Extract from a timeline created by ChatGPT. The family never left Essex England yet has events in Australia and Kent. Elizabeth Rice is fictional and the events are not sorted chronologically.

ChatGPT’s failure with the Ancestry PDF was spectacular. It invented people, changed locations, and created fictional events and people. When I pointed out errors, it created even more problems. This shows why testing different AI tools matters.

Quick Tips for Success

  1. Start simple with individual or family group reports
  2. Use structured data from family history software when possible
  3. Test different AI tools if one doesn’t work well
  4. Review results carefully before using the timeline
  5. Refine your prompt based on your specific data format.

What’s Next

Simple timelines work well with AI, but what about complex family research? In Complex Genealogy Timelines with AI, I explore multi-generational timelines and solving the errors that arise with more complex data.

The key takeaway: AI can dramatically speed up creation of genealogy timelines, but success depends on preparation, the right tools, and careful review of results.

About the Author

Danielle Lautrec is a genealogy educator, researcher, and author of The Good Genealogist. With qualifications in history, family history, and historical archaeology, she teaches for the Society of Australian Genealogists.

Methodology, Sources and resources

Excel Genealogy Timelines: Complete How-To Guide

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Family history timelines are essential analytical tools that help genealogists solve research problems, not just document information. While genealogy software provides basic chronological views, Excel genealogy timelines give you the flexibility and analytical power needed for family tree research.

This complete guide shows you exactly how to build effective genealogy spreadsheets and family history timelines in Excel, with detailed instructions, real examples, and advanced tips that will transform how you approach genealogical analysis and family history research.

Why Excel Beats Other Genealogy Timeline Tools

Excel is the best timeline choice for analytical genealogy research:

Customisable workspace: Unlike family tree software, Excel lets you structure data exactly how your research problem demands. You control what information is included and how it is formatted.

Powerful sorting and filtering: Split complex family data across multiple columns, then sort or filter by any column, such as surname, location, event type, or date range. This analytical flexibility is crucial for research planning and hypothesis testing.

Integration with genealogy working documents: Include your family history timeline as a worksheet in your Excel research plan. Keep genealogy timelines, correspondence logs, and research notes in one workbook for easy access and improved productivity.

Direct source linking: Hyperlink timeline data directly to online records or files on your computer, so you can easily examine them when needed.

Visual pattern recognition: Use conditional formatting, colour coding, and custom layouts to spot patterns in the data, such as chronological gaps, and inconsistencies that text-based timelines miss.

Cost and accessibility: Use Excel free with most computers, shareable across platforms, and exportable to any format needed for publication or collaboration.

Tip: Conditional formatting helps make patterns and trends in your data more apparent. To use it, you create rules that determine the format of cells based on their values, such as cell colours tied to age of the individual.

When to Create an Excel Genealogy Timeline

Don’t create Excel timelines for routine family tree documentation. Use your genealogy software or online family tree for that.

Create genealogy timelines in Excel when you need analytical power:

Research problem solving: When testing specific genealogy research questions or hypotheses (like parentage questions), or working through chronological puzzles that require cross-referencing multiple people and locations in your family tree.

Project management: For long-term research projects, such as one-place studies or multi-generational studies where you need to track interconnected events.

Case study development: When preparing presentations, publications, or teaching materials that require clean, customisable visual timelines.

Master family overview: When you need a comprehensive genealogy timeline covering your entire family tree. Use filters to focus on specific family lines, time periods, or geographical areas as your research demands.

Family History Timeline Structure

Chronology is the underlying structure, so place your dates in the first one or two columns. Each row represents one event.

Essential columns:

  • Date (Year column for sorting, plus another column for the full date if needed)
  • Name (Individual’s full name)
  • Surname (Separate column for filtering)
  • Event (Birth, marriage, census, land purchase, etc.)
  • Place (Location of event)

Additional columns:

  • Unique identifier number (For the Individual, from your family history software)
  • Age (At time of the event)
  • Source (Citation or reference)
  • Notes (Your analysis and observations)
  • Context (Historical events)

Step-by-Step Excel Timeline Creation Process

Step 1: Design Your Column Structure

Start with essential columns, then add additional columns based on your research question and needs:

| Year | Full Date | Surname | Full Name | Event | Place | Source | Notes |

Apply bold formatting to headers and freeze the top row for easy navigation as your timeline grows.

image of the Freeze Panes button in Excel
The freeze panes button is on the View tab. Click the drop-down arrow and select Freeze Top Row.

Step 2: Set Up Excel Features

Enable AutoFilter: Select your header row and apply filters to every column. This is crucial for analytical work.

Handling Pre-1900 Date Problems: Excel does not support dates before January 1, 1900, which affects most genealogical research. Solutions:

  • Text format approach: Format your date column as text and enter dates as “15 Mar 1847”. You lose automatic chronological sorting but improve accuracy.
  • Separate column method: Create columns for Day, Month, and Year. You can sort by year easily, and by month within year when needed.
  • Dual date system: Use a “Year” column (number format) for sorting, plus a “Full Date” column (text format) for complete information.

Add data validation: Create dropdown lists for common event types, such as birth, death and marriage, to ensure consistency across large timelines.

Data toolbar in Excel showing the Data Validation button
Find the Data Validation button on the Data tab, shown here far right.

Step 3: Enter Your Data Systematically

Start with your sources: Check your sources and create events from them, not from your family tree. This helps you verify the accuracy of the information.

Use consistent terminology: Standardise place names, event descriptions, and name formats. This consistency is essential for effective filtering and analysis.

Include gaps: Note when someone is absent from expected records, records are not available or other gaps that may provide crucial analytical insights.

Add FFANS: Don’t limit your timeline to biological family. Include events for other people, if they are relevant to your research question.

Add historical context: Include relevant historical events, such as wars, epidemics, economic changes, and legal reforms. Use a different colour or formatting, or apply a filter to hide them when not needed.

Step 4: Format for Analysis

Colour coding: Use colour to highlight patterns and assist your analysis. For example, use blue text to highlight name changes, and red for conflicting or questionable information.

Conditional formatting: Highlight cells based on criteria relevant to your research question. For example, if you are trying to identify the biological father of a child you could colour code the cells in the men’s columns based on their age when the child was born: green for a feasible age, red for too young or too old.

What Events to Include in a Genealogy Timeline

Your timeline should support your research question or hypothesis. Choose events that place the person in a particular place at a particular time, and add events that supply useful information for your question.

Include:

  • Direct evidence: Events that your research subjects directly participated in, such as birth, death and marriage.
  • Indirect evidence: Such as events of FFANs that help establish context or provide other relevant information, such as the births of siblings.
  • Negative evidence: Documented absences from expected records.
  • Contextual events: Historical events potentially relevant to the subject.

Case Study: Testing Parentage with Timeline Analysis

Research Question: Are John Shaw and Lydia Matthews the parents of Sophia Webb, born between 1831-1845?

Timeline Strategy: Create events showing locations of all three people from 1830-1850 to test whether the hypothesis is feasible.

six column Excel genealogy timeline presenting information for a case study
Example of a simple timeline for a case study

Analysis Result: Timeline revealed Sophia was unlikely to have been born before 1834, as she required parental consent to marry in 1855 and had a child in 1880. It also revealed that it was feasible that John Shaw was her father. Note, this case study is a real case study from my family, but has been simplified for the purpose of this blog post.

Advanced Timeline Techniques

Managing Complex Multi-Family Data

Use surname filtering: When working with multiple families, the surname column becomes essential for isolating specific family lines while maintaining the analytical power of a single worksheet.

Create analytical groupings: Add a “Group” or “Family” column to categorise events by research focus, such as immediate family, collateral lines, associated individuals, or groups such as convicts.

Employ consistent naming: Use standardised formats for names throughout the timeline, to help with sorting and filtering. For example, “Smith, John” rather than mixing “John Smith” and “Smith, John” formats.

Linking Sources and Documents

Transform your timeline into a research database by linking directly to sources containing your evidence:

Local file links: Link to PDFs, images, or documents stored on your computer.

Online source links: Link directly to database records, digitised documents, or research repositories. Include stable URLs when possible.

Citation integration: Use your source column for short citations, with full citations maintained in a separate worksheet or external document.

Visual Analysis Techniques

Colour Coding Strategies

By person: Assign each individual a colour to track their movements and events across time.

By evidence quality: Green for reliable evidence, yellow for insufficient evidence, red for conflicting or questionable information. See my Tree Health Assessment Tool for another example of this approach.

By geographical area: Use colours to represent different counties, states, or countries, making movement patterns immediately visible.

Conditional Formatting for Pattern Recognition

Date range highlighting: Highlight events outside expected chronological parameters, such as marriage under the age of consent.

Location analysis: Colour-code events that occur in unexpected places for your research subjects, such as a child born in a different location to its siblings.

Gap identification: Use formatting to highlight periods with unusually few events, suggesting missing evidence or research opportunities.

Timeline Maintenance and Growth

Adding New Information

Insert rows systematically: Add new events by inserting rows in chronological order. Or, if you prefer to append new events at the end of the timeline, don’t forget to re-sort by year to correct the chronology.

Update source links: When you acquire better sources or digital copies, update links and citations.

Refine analytical columns: As your research evolves, adjust colour-coding, notes, and contextual information to reflect new insights. If you prefer to keep previous versions, copy your timeline onto a new worksheet in the same file and use the new tab for the new version.

Template creation: Develop timeline templates so that you don’t need to start from scratch each time.

Sharing and Collaboration

Version control: Use clear file naming conventions when sharing timelines with research partners.

Format for export: When preparing timelines for publication, hide analytical columns (notes, personal observations) and any private information. Note that Excel files can be adjusted to fit to page before printing or saving as a PDF, so check if your timeline can fit.

scaling options when printing in Excel
When printing an Excel spreadsheet, use the Scaling button to fit rows or columns on the page

Common Mistakes to Avoid

Inconsistent formatting: Standardise names, places, and event descriptions from the beginning. Inconsistency destroys the analytical power of filtering and sorting.

Ignoring historical context: Timelines without historical context miss crucial explanatory factors for family decisions and movements.

Poor source documentation: Timeline analysis is only as good as your evidence. Check and analyse the details and the evidence. Create clear source citations for every event.

Frequently Asked Questions

Q: Do I really need Excel if my genealogy software already has timelines?

A: Software timelines are great for basic chronology, but Excel timelines are research tools. Use Excel when you need to gather information about multiple people, analyse patterns, or test specific hypotheses. Think of software timelines as documentation; Excel timelines as investigation.

Q: How do I handle dates before 1900 in Excel?

A: Use text formatting for your date column (enter as “15 Mar 1847”) or create separate Day/Month/Year columns. For sorting, add a separate “Year” column formatted as numbers. This dual approach gives you both flexibility and analytical power.

Q: Should I create separate timelines for each ancestor or one master timeline?

A: Start with a worksheet containing all relevant people, then use filters to focus on individuals or families. This approach maximises Excel’s analytical capabilities and often reveals connections you’d miss with separate timelines.

Q: What’s the minimum number of events needed for effective analysis?

A: Quality matters more than quantity. Even ten strategically chosen events can solve research problems if they address your specific question. Focus on events that help test your hypothesis, although creating comprehensive life histories could be useful too, if you are writing their stories.

Q: Can I link my timeline to digital documents and online sources?

A: Absolutely. Use Excel’s hyperlink feature to connect timeline events directly to PDF documents, online database records, or local files. This transforms your timeline into a research database, and helps maintain the link between the event and the evidence.

Q: How do I share timelines with research partners who don’t have Excel?

A: Export to CSV format for universal compatibility, save as PDF for presentation purposes, or use Excel Online for shared editing. Consider creating a simplified version for sharing while maintaining your full analytical version.

Q: What if my timeline becomes too large and unwieldy?

A: Use Excel’s filtering and column-hiding features rather than breaking it into multiple sheets. Group related events, use colour coding, and consider creating summary views for different research focuses while maintaining one comprehensive dataset.

Conclusion

Excel timelines are essential for taking a systematic and analytical approach to genealogy research. They help you conduct a more comprehensive investigation and reveal patterns that may not be visible in family tree charts. The key to an effective analytical timeline lies in strategically selecting individuals and events that support your research questions. Use Excel timelines to support evidence-based conclusions that progress your family history research.

Ready to get started? Create a timeline and try the techniques described here with your own research challenge.

Read why I chose Excel as my genealogy timeline tool, in my article, Best Tools for Creating Genealogy Timelines: A Comparison

Find more of my Excel guides on my Excel page

Read about using AI to generate timelines in Excel, in Create a Genealogy Timeline With AI: Getting Started.

Come along to one of my courses, with the Society of Australian Genealogists

About the Author

Danielle Lautrec is a genealogy educator, researcher, and author of The Good Genealogist. With qualifications in history, family history, and historical archaeology, she teaches for the Society of Australian Genealogists.

Methodology, Sources and resources

Use genealogy timelines to organise, analyse and improve your research

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If you think timelines are just for visualising a sequence of events, you’re overlooking one of the most powerful genealogy research tools. A genealogy timeline is more than a list of dates. It’s a framework for understanding your family history.

By placing people in time and space, timelines help clarify identities, expose gaps and inconsistencies, and reveal patterns. These insights can significantly improve the quality of your family history.

In this article, I show how genealogy timelines can help you:

  • Organise complex information
  • Improve research accuracy
  • Plan future research
  • Solve difficult genealogical problems
  • Compare data and evaluate relationships
  • Add historical context to family stories
  • Write clearer and more engaging narratives.

Use timelines to organise and analyse genealogy information

Genealogy generates a lot of data. Timelines bring order by organising information chronologically and geographically, making it easier to see relationships and patterns.

You can easily integrate new information and retrieve it later. This helps you understand your family history more deeply and reduces the risk of overlooking key connections.

Use timelines to improve the accuracy of your family history

The chronological structure of a timeline highlights inconsistencies, such as a person being in two places at once, or multiple versions of an event when there should be only one. These errors often remain hidden in family tree charts but become obvious in a timeline.

A timeline showing multiple baptisms in different locations indicates that the evidence has not been sufficiently analysed to determine which event was the correct one.

Use timelines to plan your research

Whether you’re investigating ancestors in the 1800s or analysing DNA matches today, timelines help you spot gaps, formulate focused research questions, and compare life events across individuals and families. These strategies form the basis of effective timeline analysis in genealogy.

Timelines summarise the key events in a person’s life and highlight periods with little or no data. This helps you spot where you may have missing family members, such as children whose birth records you have not discovered, or identify when and where a family moved. These provide clues to progress your research.

Analysing a timeline can help you:

  • Identify new research leads
  • Develop hypotheses to be tested
  • Formulate focused research questions.
A timeline in Excel shows a gap in the birth years of children which may suggest a missing child requiring further investigation.

Use timelines to solve problems and test hypotheses

Timelines clarify inconsistencies and support hypothesis testing. If you’re trying to demonstrate that someone was in the right place at the right time, a timeline can provide the structure to support or refute that claim.

Example:

A DNA case involved identifying the unknown biological father of a test taker’s father. Analysis of DNA evidence pointed to a family with eight brothers. A timeline based on documentary evidence compared their locations and ages at the time of conception, which helped narrow down the candidates.

Use timelines to compare and analyse relationships

You can include multiple individuals on a single timeline to compare life events, identify patterns and assess possible relationships. This can help confirm family links, or reveal mistaken connections.

Example:

A mother was listed in family trees as giving birth at age 50 and issuing memorial notices about her husband, after the date she was supposed to have died! A timeline revealed that two families had been mistakenly merged due to identical parent names.

Use timelines to document evidence

Timelines can supplement written analysis in an evidence summary or evidence argument (aka proof summary or proof argument). Organising your findings chronologically strengthens the logic of your case and helps readers understand the reasoning behind your conclusions.

Use timelines to provide historical and family context

Timelines place your family’s events within the broader context of historical events, communities and extended families. This can provide clues to motivations or influences, or explain significant life changes such as migration, enlistment, or death due to a prevalent illness or famine.

Example:

A timeline of sons’ births overlaid with World War I dates highlighted why certain young men were absent—they had gone to war.

Use timelines as visual and summary tools

Timelines are ideal for summarising a life story at a glance. They can be shared with family members or other researchers and used as reference tools during research.

A simple timeline graphic from my book, The Good Genealogist, summarises key life events in a visually accessible way.

Use timelines to write your family stories

When writing, a timeline provides a narrative scaffold. It helps ensure chronological accuracy and can stimulate story ideas by highlighting connections between events and people.

Get started using timelines

From simple life summaries to advanced analysis using tools like Excel or Notion, genealogy timelines should be a standard feature of your family history research toolkit.

Tip

What to include in a genealogy timeline for effective family history research:

  • Dates
  • Places
  • People
  • Events
  • (optional) Source citations, Historical events, Research notes.

Ready to get started? Check out my guide to creating a genealogy timeline in Excel.

Read my comparison of genealogy timeline tools to find the right one for your research.

Have questions or tips of your own? Share them in the comments below!


Want more articles about planning your research, analysing information and sources, or documenting your research? Or take a look at my articles about using Excel and Notion in family history.

Here are some examples of historical timelines you can use to add historical context to your family history timelines:

Timeline of Australian history – Wikipedia

Defining moments timeline | National Museum of Australia

Story of England | English Heritage