Who was Thomas Brennan?

Thomas Brennan (1891–1978) was born in Nebraska, USA and died in Los Angeles, Los Angeles, California, USA. 4 researchers on YourRoots have this ancestor in their family trees.

How many people are researching Thomas?

Right now, 4 researchers on YourRoots have Thomas in their trees. The ancestor migration map traces 3 generations of this lineage.

What records do they have for Thomas?

Records vary by researcher and can include census, vital, parish, cemetery, and family sources.

How do I compare family trees?

Use Compare Tree on an available researcher profile to compare overlapping people and records.

Thomas A Brennan 1891–1978

Public Tree Person

What is a Public Tree Person?

A Public Tree Person is an ancestor documented independently by multiple YourRoots tree owners. When several researchers' family histories converge on the same person, we publish a shared page that combines what they've documented.

Why this is a Public Tree Person

Full name consistent across 4 independent trees

Birth year and location consistent across 4 trees

Death year and location consistent across 4 trees

Compare a Public Tree Person with your own tree using Compare Tree.

C Reliability

Reliability Score: C

Basic — based on the source tree

Grade scale

A 3 criteria (Strong)
B 2 criteria (Medium)
C 1 criteria (Basic)

Verification checklist

Record available
Descendant's record available
Star tree owner

4 researchers on YourRoots have Thomas Brennan in their family trees — each with their own records and documentation. Trace the migration path across 3 generations. If this ancestor is in your tree too, you can compare what you've found and fill in the gaps together.

Last updated: July 22, 2026 · Reliability: C — verified across 4 independent trees

Born 21 Oct 1891 · Nebraska, USA

Died 25 Mar 1978 · Los Angeles, Los Angeles, California, USA

Father John M Brennan

Children Thomas Arthur Brennan

Compare Tree

Researchers connected through Thomas Brennan 1891–1978

and 3 more tree owners connected with Thomas Brennan 1891–1978

Immediate Family

Parents

John M Brennan

Spouse(s)

No spouse recorded

Children

Thomas Arthur Brennan

Biography

Thomas A Brennan was born in 1891 in Nebraska, USA, the child of john m brennan. Thomas A Brennan had children including thomas arthur brennan. Thomas A Brennan passed away in 1978 in Los Angeles, Los Angeles, California, USA.

Sources

Life Timeline

1891

Birth of Thomas A Brennan in Nebraska, USA

Birth

1978

Death of Thomas A Brennan in Los Angeles, Los Angeles, California, USA

Death

Oldest Ancestor Line from Thomas Brennan

This ancestor line traces from Ireland (1823) to Nebraska, USA (1891) across 3 generations.

Direct Lineage

generations

Frequently Asked Questions

: Thomas Brennan (1891–1978) was born in Nebraska, USA and died in Los Angeles, Los Angeles, California, USA. 4 researchers on YourRoots have this ancestor in their family trees, each with their own records. This page combines what they've independently documented and assigns a Reliability Score (C) based on cross-tree validation.
: Right now, 4 researchers on YourRoots have Thomas in their trees. They're working independently, so connecting with them is a good way to cross-check your records and find things you might have missed. You can also explore the ancestor migration map that traces 3 generations of this lineage geographically.
: It varies by researcher — some have census records, others have marriage certificates, parish registers, or family Bible entries. Scroll up to see exactly what each person has cited.
: Use the "Compare Tree" button on any researcher's profile above. You can compare your tree side by side with theirs, see where your records overlap or differ, and collaborate to fill gaps.

Related Records

John M Brennan

Father

Brennan US Census Records

Browse all census records

Thomas Brennan's Ancestors

Pedigree chart — 3 generations on record

Self

Thomas A Brennan PTP

1891–1978

Nebraska, USA