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How to start a family tree when you only know your grandparents

Published by Generation Archives on October 25, 2026. Last updated November 5, 2026.

Most family trees do not begin with a stack of birth certificates. They begin with a person who can name their grandparents and is not sure of much else. That is a fine place to start. Four grandparents already give you eight great-grandparents to look for, and the blank spaces are useful. A blank means you have not learned it yet. A guess written down as fact is much harder to undo later.

Write yourself down first

Put yourself on the page, then your parents, then each of their parents. Use the names people were known by in the family, and add a legal name when you know it is different. Maiden names belong on the page even when a grandmother used a married name for fifty years. If you are unsure of a spelling, write the spelling you heard and note that it came from memory.

Dates can be partial. A year is enough. "Born about 1924" is better than a blank if someone is confident of the decade, and it is better than a made-up day. Places can be partial too. A town, a county, or a country is worth recording. "Somewhere in Saskatchewan" is a real clue. "Unknown" is also a real answer.

Ask one person, then ask another

The fastest progress usually comes from a conversation, not from a website. Pick one relative who likes to talk about the family and ask about a specific person, not "tell me everything." Good questions are small:

What did your mother call her parents?
Who were her brothers and sisters, in birth order if you remember it?
Where did the family live when you were a child?
Who has the photo albums, the Bible, or the box of letters?

Write the answers the same day. Memory edits itself overnight. Note who told you and when. A second relative will contradict the first on something. Keep both versions until a record sorts it out. Sisters often disagree about a birth year by one, and both can be recalling the same birthday cake.

What to collect before you hunt records

You do not need a subscription to a records site to do this part. Gather what the family already has:

Names, even nicknames
Approximate years and places
The names of siblings, spouses, and children
Photos with anything written on the back
Funeral cards, wedding programs, and newspaper clippings
The name of a church, a regiment, a farm, or an employer

Those details tell you where a record might exist later. A regiment and a war narrows a service file. A church and a town narrows a baptism. A farm name can be enough for a local history book.

Leave the unknown unknown

It is tempting to fill a father's name because two cousins on the internet used it. Do not copy a name into your tree until you know why you believe it. If you do keep a lead, label it as a lead. "A public tree says John Hale, not checked" is honest. "John Hale" with a full birth date you did not verify is how mistakes spread.

Work one generation at a time. When you can name a couple and roughly where they lived, you have enough to look for a marriage or a census later. You do not need their parents before you write them down.

Keep a copy you can move

Write the tree somewhere you can take a copy out. Paper is fine if you also photograph the pages. A file you can export, usually GEDCOM, means you are not stuck if you change tools. Photos often do not travel inside that file, so keep the scans in a folder with names that match the people.

Start with the four grandparents you can say out loud. The blanks are the research list.

A first weekend, step by step

If "start a tree" feels vague, here is a plan that fits in a weekend and needs nothing but a notebook or a blank document.

Saturday morning: write what you already know. Set a timer for thirty minutes. List yourself, your parents, and your four grandparents. Add siblings and your parents' siblings if you know them. Do not look anything up. The goal is to find out how much you already carry in your head, and where it stops.

Saturday afternoon: mark the gaps. Next to each name, write the three things you could not say: a birth year, a birthplace, and the maiden name for the women. Then pick the three gaps that would matter most. A grandmother's maiden name unlocks a whole family line, so it usually goes first.

Sunday: make two phone calls. Choose the two relatives most likely to know the answers. Ask your small questions, take notes while you talk, and write the date at the top of the page. If you want a longer list of questions to draw from, how to interview relatives for family history has one organized by topic.

By Sunday evening you will probably have two new generations of names, a handful of conflicting dates, and a clearer idea of who has the photographs. That is a successful weekend.

A fictional example

To make this concrete, here is a made-up starting point for a person named Dana Whitfield. She can name all four grandparents: Walter and Ruth on her father's side, and Joe and Margit on her mother's. She does not know Joe's legal first name, Ruth's birthplace, or either great-grandparent on the Whitfield side.

Dana's notebook after her first weekend looks like this:

Walter Whitfield, born 1931, Duluth (from Dad). Parents: Henrik and Anna, surname of Anna unknown.
Ruth Kessler, born "mid 1930s" (Dad), place unknown. Mom's sister Aunt Gail may know.
Joe Ames, called Joe, legal name unknown. Margit, maiden name unknown. Thunder Bay. (Mom)
Lead: Mom says there is a shoebox of letters at Aunt Gail's.

Nothing in that list is proven. Everything in it is useful. The notebook records who said what, shows exactly which questions are open, and points to a shoebox of letters. If Dana had instead typed "Joseph Ames, 1928, Thunder Bay" into a tree because it seemed plausible, she would have buried the open question under an invented answer.

Mistakes that are easy to avoid

Starting with the most interesting ancestor. A famous surname or a family legend is tempting, but it is the likeliest place for a wrong link. Start with yourself and walk back.
Copying from a stranger's tree without a note. Treat other online trees as clues and label them as such.
Merging two people who share a name. Two men named John Hale in the same county may be a father and son, cousins, or unrelated. Keep them separate until a record joins them.
Dropping the women's birth names. A tree of married surnames hides half of every family.
Collecting everything and organizing nothing. Scans pile up. Save each one with a file name that includes the person and the year, and write the source beside it. How to cite a photo, letter, or interview shows how short a good note can be.
Posting living relatives' details online. Before sharing, read what to record about living people.

When to move from notebook to software

A notebook is a fine place to begin and a poor place to stay. Think about moving to a tree when you notice any of these:

You have crossed out and rewritten the same page more than twice.
You are about to ask a second relative who might disagree with the first, and you want a place to keep both answers.
Photos and names are in different places and you keep losing track of who is who.
A cousin wants to help, and you would like them to add facts rather than email you corrections.

You can also begin in software from day one. In Generation Archives, the demo lets you try it without signing up, and a free account keeps the tree private by default, visible only to you and relatives you invite. The private family tree guide explains how sharing works. If you use both a notebook and an app, the notebook is the place for leads and the tree is the place for facts you are willing to stand behind.

For a fuller checklist that goes beyond your grandparents, see how to start a family tree. When you are ready to label photos, organize family photos for a tree has a naming scheme that scales. And when you have a few years of work, back up your family tree so it does not live in one place.

Frequently asked questions

Do I need birth certificates to start?

No. Names and rough dates from the family are enough to begin. Records come later, and they are easier to find once you know who lived where.

What if I do not know a maiden name?

Leave it blank and ask. A married name alone is still worth recording. Note that the birth name is unknown so you do not invent one.

Should I start with myself or with the oldest person I know?

Start with yourself and walk backward. You already know how you connect to the people you add. Starting from a famous or distant ancestor makes it easy to attach the wrong line.

What if my family does not talk about the past?

Start with the objects instead of the people. Photos with writing on the back, funeral cards, old address books, and a parent's wallet card all hold names. Ask a relative to help you identify the people in one photo rather than asking them to tell the family story. A photo is an easier thing to talk about than a memory.

How far back can I get from just my grandparents?

It depends on how much was written down. Many families get three or four more generations from conversations and documents the family already has. Beyond that you will usually need records, which are a research project of their own. The tree you build now is the foundation either way.

Is it better to use paper or an app?

Whichever you will actually use. A paper chart is good for the first few conversations. An app is better once you have photos, several relatives involved, or more than a couple of generations. You can start on paper and enter the people later, and you can export a GEDCOM from most apps so you are not locked in. See what is GEDCOM.

Should I write down what I think I remember about my own childhood?

Yes, and mark it as memory. Your own recollections of grandparents' homes, sayings, and habits are the kind of detail that disappears. Put them in a note on that person, dated, and say they are from memory.

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