TF
Thomas Flynn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Flynn across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Flynn |
| Given Name | Thomas B. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Laborer common |
| Industry | Construction Company |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer Common |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1915 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Margaret Flynn | Daughter | — | 22 | ~1918 |
| Thomas Flynn | Head | — | 55 | ~1885 |
| Thomas Flynn | Son | — | 25 | ~1915 |
| James Flynn | Son | — | 26 | ~1914 |
Census Appearances
1920
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | Thomas W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 15
Cook, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | Thomas A Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 25
Cook-County, Illinois · implied b. ~1915 — 4 household members
| Surname | Flynn |
| Given Name | Thomas B. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Laborer common |
| Industry | Construction Company |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Thomas Flynn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Flynn (~0.92 confidence) and father Thomas Flynn (~0.92 confidence) and mother Catherine Flynn (~0.92 confidence) and mother Katherine Flynn (~0.92 confidence) and father Thomas Flynn (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Flynn
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Thomas Flynn
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Catherine Flynn
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Katherine Flynn
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Thomas Flynn
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
Thomas Flynn
Son · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Margaret Flynn
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Flynn
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00943-00423)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Schlosser | 45 | Head | Butcher | Illinois |
| 2 | Elene|Elena Schlosser | 39 | Wife | — | Illinois |
| 3 | John Jr. Schlosser | 15 | Son | — | Illinois |
| 4 | Kenneth Schlosser | 9 | Son | — | Illinois |
| 5 | Leonard Brill | 58 | Head | Laborer Common | Illinois |
| 6 | Nellie Brill | 58 | Wife | — | Illinois |
| 7 | Oscar J. Werner | 54 | Head | Switchman | Sweden |
| 8 | Mary Werner | 53 | Wife | — | Illinois |
| 9 | Charles Werner | 21 | Son | Checker | Illinois |
| 10 | Marie Werner | 17 | Daughter | — | Illinois |
| 11 | Edward Werner | 15 | Son | — | Illinois |
| 12 | Mary Ughranek | 72 | Head | — | Bohemia |
| 13 | Frank Ughranek | 50 | Son | — | Illinois |
| 14 | Anne Ughranek | 45 | Daughter | — | Illinois |
| 15 | Anne Darrow | 54 | Head | — | Illinois |
| 16 | Margaret Darrow | 23 | Daughter | Packer | Illinois |
| 17 | Mary Darrow | 20 | Daughter | Packer | Illinois |
| 18 | Patricia Darrow | 12 | Daughter | — | Illinois |
| 19 | Charles Hubler | 41 | Head | Sheet Metal Helper | Wisconsin |
| 20 | Myrtle Hubler | 34 | Wife | — | Illinois |
| 21 | Bernice Hubler | 18 | Daughter | — | Wisconsin |
| 22 | Theodore Hubler | 15 | Son | — | Wisconsin |
| 23 | William Wright | 66 | Head | Printer | Illinois |
| 24 | Katherine Wright | 61 | Wife | — | Illinois |
| 25 | John M. Wright | 32 | Son | Salesman | Illinois |
| 26 | Thomas B. Flynn | 55 | Head | Clerk | Illinois |
| 27 | Thomas B. Jr. Flynn THIS PERSON | 25 | Son | Laborer Common | Illinois |
| 28 | James Flynn | 26 | Son | Laborer Common | Illinois |
| 29 | Margaret Flynn | 22 | Daughter | — | Illinois |
| 30 | Joseph Perkovich | 44 | Head | Laborer Common | Austria |
| 31 | Kate Perkovich | 38 | Wife | — | Slovakia |
| 32 | Anna Perkovich | 17 | Daughter | — | Illinois |
| 33 | John Perkovich | 16 | Son | — | Illinois |
| 34 | Frank Perkovich | 14 | Son | — | Illinois |
| 35 | Rosemary Perkovich | 9 | Daughter | — | Illinois |
| 36 | Joseph Jr. Perkovich | 2 | Son | — | Illinois |
| 37 | Henry Sr. Kowalski | 25 | Head | Freight Hand | Illinois |
| 38 | Elizabeth Kowalski | 21 | Wife | — | Illinois |
| 39 | Henry Jr. Kowalski | 0 | Son | — | Illinois |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)