YourRoots Logo
Sign up free
banner

Sign up to explore more

Create a free account to navigate family trees, view ancestors, and discover connections.

Sign up free

Thomas O'Brien 1884 – 1946 – Genealogical Records

Birth Date: 01 May 1884

Birth Location: Chicago, Illinois

Death Date: 22 Dec 1946

Death Location: Chicago, Cook, Illinois

Father: Thomas O'Brien

Mother: Mary Lake

Spouse(s): Hazel Black

Children(s): Roger O'Brien, Lulu OBrien

The story of Thomas O'Brien began in 1884 in Chicago, Illinois. In 1900, Thomas O'Brien resided in Chicago Ward 34, Cook, Illinois, USA. In 1935, Thomas O'Brien resided in Chicago, Cook, Illinois. Thomas O'Brien married Hazel Deforest Dorothy Black, and had children including Roger O'Brien, Lulu OBrien. Thomas O'Brien passed away in 1946 in Chicago, Cook, Illinois.

Find more search results for Thomas O'Brien
TO

Reliability Score

This score reflects the reliability of the source family tree. A high rating indicates a trustworthy source with strong data consistency.

Reliability Score:
B
Criteria:
  • A 3 criteria (Strong)
  • B 2 criteria (Medium)
  • C 1 criteria (Basic)
  • N/A 0 criteria (Insufficient)

This tree's reliability score:

  • Record available
  • Descendant's record available
  • Star tree owner

Biography

  • The story of Thomas O'Brien began in 1884 in Chicago, Illinois.
  • In 1900, Thomas O'Brien resided in Chicago Ward 34, Cook, Illinois, USA.
  • In 1935, Thomas O'Brien resided in Chicago, Cook, Illinois.
  • Thomas O'Brien married Hazel Deforest Dorothy Black, and had children including Roger O'Brien, Lulu OBrien.
  • Thomas O'Brien passed away in 1946 in Chicago, Cook, Illinois.

Immediate Family

Parents

Thomas O'Brien
1849 –
Birth Location: Ireland
TO
Mary Lake
1846 –
Birth Location: England
ML

Spouses(s)

Hazel Black
1893 – 1985
Birth Location: Coffeyville, Montgomery, Kansas, USA
HB

Children(s)

Roger O'Brien
1909 –
Birth Location: Illinois
RO
Lulu OBrien
1918 –
Birth Location: Montana
LO

Thomas O'Brien's Ancestors

Self
Thomas O'Brien
1884 – 1946
Birth Place: Chicago, Illinois
Parents
Thomas O'Brien
1849 –
Ireland
Mary (Jane) Lake
1846 –
England
Grandparents
Great-Grandparents
2nd-Great-Grandparents

Thomas O'Brien's Descendants

1.
TO
Thomas O'Brien (01 May 1884 – 22 Dec 1946) m. Hazel (Deforest Dorothy) Black (15 Nov 1893 – May 1985)
  1. 1. Roger O'Brien (abt 1909 – )
  2. 2. Lulu OBrien (abt 1918 – )

Thomas O'Brien's Timeline

7 Records

1884
01 May 1884
Birth of Thomas O'Brien in Chicago, Illinois
Chicago, Illinois
1900
1900
Age 16
Thomas O'Brien resided here in Chicago Ward 34, Cook, Illinois, USA
Chicago Ward 34, Cook, Illinois, USA
1935
1935
Age 51
Thomas O'Brien resided here in Chicago, Cook, Illinois
Chicago, Cook, Illinois
1940
1 Apr 1940
Age 56
Thomas O'Brien resided here in Chicago, Cook, Illinois, USA
Chicago, Cook, Illinois, USA
1942
1942
Age 58
Thomas O'Brien resided here in Chicago, Illinois, USA
Chicago, Illinois, USA
1946
22 Dec 1946
Age 62
Death of Thomas O'Brien in Chicago, Cook, Illinois
Chicago, Cook, Illinois
1946
26 Dec 1946
Age 62
Burial of Thomas O'Brien in Worth, Cook, Illinois
Worth, Cook, Illinois

Sources

    Genealogy Event 1
    Event Type: Birth
    Event Date: 01 May 1884
    Event Place: Chicago, Illinois
    Record Source:
    [1] U.S. World War II Draft Registration Cards, 1942, The National Archives at St. Louis; St. Louis, Missouri; World War II Draft Cards (Fourth Registration), for The State of Illinois; State Headquarters: Illinois; Microfilm Series: M2097; Microfilm Roll: 214
    [2] 1940 United States Federal Census, Year: 1940; Census Place: Chicago, Cook, Illinois; Roll: T627_921; Page: 9B; Enumeration District: 103-17
    [3] Illinois, Deaths and Stillbirths Index, 1916-1947
    [4] 1900 United States Federal Census, Year: 1900; Census Place: Chicago Ward 34, Cook, Illinois; Roll: 289; Page: 15B; Enumeration District: 1077; FHL microfilm: 1240289

    Genealogy Event 2
    Event Type: Residence
    Event Date: 1900
    Event Place: Chicago Ward 34, Cook, Illinois, USA
    Record Source: 1900 United States Federal Census, Year: 1900; Census Place: Chicago Ward 34, Cook, Illinois; Roll: 289; Page: 15B; Enumeration District: 1077; FHL microfilm: 1240289

    Genealogy Event 3
    Event Type: Residence
    Event Date: 1935
    Event Place: Chicago, Cook, Illinois
    Record Source: 1940 United States Federal Census, Year: 1940; Census Place: Chicago, Cook, Illinois; Roll: T627_921; Page: 9B; Enumeration District: 103-17

    Genealogy Event 4
    Event Type: Residence
    Event Date: 1 Apr 1940
    Event Place: Chicago, Cook, Illinois, USA
    Record Source: 1940 United States Federal Census, Year: 1940; Census Place: Chicago, Cook, Illinois; Roll: T627_921; Page: 9B; Enumeration District: 103-17

    Genealogy Event 5
    Event Type: Residence
    Event Date: 1942
    Event Place: Chicago, Illinois, USA
    Record Source: U.S. World War II Draft Registration Cards, 1942, The National Archives at St. Louis; St. Louis, Missouri; World War II Draft Cards (Fourth Registration), for The State of Illinois; State Headquarters: Illinois; Microfilm Series: M2097; Microfilm Roll: 214

    Genealogy Event 6
    Event Type: Residence
    Event Place: Chicago, Cook, Illinois
    Record Source: Illinois, Deaths and Stillbirths Index, 1916-1947

    Genealogy Event 7
    Event Type: Death
    Event Date: 22 Dec 1946
    Event Place: Chicago, Cook, Illinois
    Record Source: Illinois, Deaths and Stillbirths Index, 1916-1947

    Genealogy Event 8
    Event Type: Burial
    Event Date: 26 Dec 1946
    Event Place: Worth, Cook, Illinois
    Record Source: Illinois, Deaths and Stillbirths Index, 1916-1947
Find more search results for Thomas O'Brien

About YourRoots

Family Tree Map

Explore your family tree geographically

Import your GEDCOM file to transform your family tree into an interactive global map. See your roots laid out visually and understand your true geographic heritage.

Powerful tools like “Trace Back To Me” instantly map your family’s migration paths from a chosen ancestor all the way back to you.

LEARN MORE
AI Genealogy Research

Discover ancestors beyond “end-of-line” automatically

Import your family tree and let AI expand it for you. AI Ancestor Finder scans “end-of-line” ancestors to uncover their parents across hundreds of family lines at once. AI Deep Research analyzes selected ancestors and family clusters, suggesting relevant records and next steps.

Turn on Auto Research Mode to get new discoveries daily or weekly, so your tree keeps growing even while you’re away.

LEARN MORE
DNA Match

Find more DNA matches across all DNA tests

Combine your DNA data with your family tree to unlock the full power of YourRoots DNA Match. Connect with relatives across major testing services — Ancestry, 23andMe, MyHeritage, and more.

View your matches’ maps and trees to identify shared ancestors, and soon you’ll be able to add them directly to your own tree and map.

LEARN MORE
Ancestry Reports

Ancestry DNA analysis that goes deeper than others

Unlock exclusive reports that reveal your deeper origins.

  • Deep Ancestry Report — Analyze 130+ ethnicities, sub-regions, and 1,800+ communities in one detailed view.
  • Global & Native American Reports — Developed with Stanford researchers to uncover hidden ancestries across all 22 chromosomes.
  • Ancient DNA Series — Compare your DNA with 1,000+ ancient genomes from Viking, Celtic, and early American civilizations.
LEARN MORE