Why You Should Research Your Ancestors' Descendants (And Not Just Your Direct Line)

Why researching your ancestors' descendants can reveal new stories, solve genealogy brick walls, and enrich your family history.

Why You Should Research Your Ancestors' Descendants (And Not Just Your Direct Line) in Genealogy

Have you ever spent hours—or even years—researching your direct ancestors, only to find yourself staring at a brick wall? If so, you may be overlooking one of the most powerful research strategies in genealogy: descendancy research.

When most people begin tracing their family history, they naturally focus on their direct ancestors—parents, grandparents, great-grandparents, and so on. While that's an important part of genealogy, it's only one side of the story.

What many genealogists don't realize is that researching an ancestor's descendants can usually reveal information that just isn't found by following your direct line alone. In fact, some of my biggest breakthroughs, both in my own family history and in client research, have come from looking forward instead of backward.

What Is Descendancy Research?

Descendancy research is exactly what it sounds like: instead of tracing your family tree backward through your direct ancestors, you start with an ancestor and research all of their descendants—their children, grandchildren, great-grandchildren, and beyond.

Rather than focusing on a single branch, you're building an entire family network.
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This approach may take more time, but the rewards can be tremendous.

Why Research Descendants?

There are many reasons to research the descendants of an ancestor, and each project may have a different goal. Here are just a few ways descendancy research can benefit your family history research.

Break Through Brick Walls

Sometimes the answers you're searching for aren't found in your direct ancestor's records—they're hidden in the records of a sibling, cousin, niece, nephew, or another descendant.

Perhaps a descendant's obituary identifies family members that earlier records never mentioned. A probate record may name heirs that establish relationships. A newspaper article might explain why a family suddenly disappeared from one location and reappeared somewhere else.

By researching the entire family, you can uncover clues that solve long-standing mysteries.

Find Living Relatives

One of the most common reasons I use descendancy research methods is to locate living relatives.

Whether you're hoping to reconnect with distant cousins, interview family members, identify potential DNA testers, or just expand your family connections, researching descendants often leads to relatives you never knew existed.

Locate Family Photographs and Heirlooms

Family treasures don't always stay with your direct line.
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Old photographs, family Bibles, letters, military memorabilia, journals, and other heirlooms often pass down through different branches of the family. A distant cousin may unknowingly have the very photograph you've spent years searching for.

Preserve Family Stories

Every branch of a family preserves different memories.

One cousin may remember stories about a great-grandparent's military service, while another has childhood memories, photographs, or letters that have never been shared with the rest of the family.

Researching descendants helps preserve these stories before they're lost to time.

Support DNA Research

Descendancy research and genetic genealogy work hand in hand.

When trying to solve an unknown parentage case, identify the parents of an ancestor, or confirm a family connection, finding the right living descendants to test can make all the difference.
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Building accurate descendancy trees also helps identify how DNA matches may fit into your family.

Understand the Family as a Whole

Our ancestors didn't live in isolation.

They lived within families, communities, and networks of relatives who usually migrated together, served together in the military, witnessed each other's records, inherited property from one another, and appeared together throughout the historical record.

Researching descendants lets you to see the bigger picture rather than viewing each ancestor as a single individual.

Estate, Probate, and Heir Research

Descendancy research is also an important tool in legal genealogy.

Professional genealogists are often asked to identify living heirs, locate beneficiaries named in wills, or reconstruct families for probate and estate matters.
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These projects require researching entire descendant lines to determine who is living today and how they relate to the deceased.

Medical Genealogy

Family health history can sometimes be better understood by researching descendants.
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Learning about inherited conditions that appear across multiple branches of a family may help identify patterns that aren't obvious when looking only at your direct line.

When Should You Consider Descendancy Research?

Descendancy research may be especially useful if you are:

• Trying to break through a brick wall.
• Looking for living relatives.
• Searching for potential DNA testers.
• Hoping to locate old family photographs or heirlooms.
• Looking for a family Bible.
• Planning a family reunion.
• Conducting estate or heir research.
• Researching inherited medical conditions.
• Wanting to better understand an ancestor's entire family.

If any of these sound familiar, descendancy research may be exactly the strategy you need.

Looking Beyond Your Direct Line

It's easy to become so focused on tracing your family tree backward that we forget another equally important direction—forward.

Every child, grandchild, and great-grandchild of an ancestor represents another branch of your family's story. Those branches usually hold records, photographs, memories, DNA connections, and clues that can help answer questions your direct line alone cannot.

After years of researching descendants for my own family, clients, attorneys, and investigators, I've found that some of the greatest discoveries happen when we stop looking only at where our ancestors came from and start exploring where their families went.

Sometimes, the key to understanding the past is found by researching those who came after.

This series is based off of my 2017 "Finding Descendants in Your Family Tree"  presentation

More Genealogy Research Methods & Tips

Get more genealogy research tips, under the Genealogy Research Tips and Genealogy Quick Tips categories.