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Thomas Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Lynch across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Henry & Thomas — first a son (b.~1918), then head of a 10-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lynch |
| Given Name | Thomas F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Occupation | Screw Machine Operator |
| Industry | Manufacturer Steel Welding |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1152 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Screw Machine Operator |
| Township / Ward | Chicago |
| Est. Birth Year | ~1918 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Betty Lynch | Daughter | — | 21 | ~1919 |
| Laverne Carlson | Daughter | — | 20 | ~1920 |
| Axel Carlson | Head | — | 43 | ~1897 |
| Thomas Lynch | Son | — | 22 | ~1918 |
| Mathew Lynch | Son | — | 19 | ~1921 |
| John Lynch | Son | — | 31 | ~1909 |
| Willard Carlson | Son | — | 18 | ~1922 |
| Sara Lynch | Spouse | — | 58 | ~1882 |
| Leona Carlson | Spouse | — | 43 | ~1897 |
| Henry Lynch | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Thomas Martin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 10 household members
| Surname | Lynch |
| Given Name | Thomas F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO |
| 1935 Residence (County) | COOK |
| Occupation | Screw Machine Operator |
| Industry | Manufacturer Steel Welding |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1152 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| 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 Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry Lynch (~0.92 confidence) and father Thomas Lynch (~0.92 confidence) and mother Sara Lynch (~0.92 confidence) and father Michael Lynch (~0.92 confidence) and mother Veronica Lynch (~0.92 confidence) and father Axel Carlson (~0.92 confidence) and mother Leona Carlson (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry Lynch
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Thomas Lynch
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Sara Lynch
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Michael Lynch
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Veronica Lynch
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Axel Carlson
b. ~1897
Source father
● Household
· direct · ~0.92
Mother
Leona Carlson
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Lynch
Son · 1940 · age 22 · b. ~1918 · Illinois
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Sibling
John Lynch
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mathew Lynch
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laverne Carlson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willard Carlson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Lynch
Sibling · 1940 · age 21
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
40 people indexed on this census page (nara:1940:m-t0627-00998-01081)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William C Pehta | 19 | Son | No | Illinois |
| 42 | Dorothy R Pehta | 16 | Daughter | No | Illinois |
| 43 | Katherine Mundy | 68 | In Law | No | Indiana |
| 44 | Michael Metzler | 46 | Head | Die Maker | Austria |
| 45 | Theresa T Metzler | 44 | Wife | No | Illinois |
| 46 | Eugene Thomas | 27 | Son In Law | Apprentice | Illinois |
| 47 | Margaret Thomas | 22 | Daughter | Telephone Operator | Illinois |
| 48 | Axel W Carlson | 43 | Head | Salesman | Illinois |
| 49 | Leona R Carlson | 43 | Wife | No | Illinois |
| 50 | Laverne R Carlson | 20 | Daughter | General Off. Work | Illinois |
| 51 | Willard B Carlson | 18 | Son | Office Boy | Illinois |
| 52 | Sara E Lynch | 58 | Wife | No | Illinois |
| 53 | John H Lynch | 31 | Son | Proprietor | Illinois |
| 54 | Thomas F Lynch THIS PERSON | 22 | Son | Screw Machine Operator | Illinois |
| 55 | Betty E Lynch | 21 | Daughter | New Worker | Illinois |
| 56 | Mathew Lynch | 19 | Son | Bartender | Illinois |
| 57 | Henry G Lynch | 65 | Husband | Motorman | Ireland |
| 58 | Peter S Bures | 52 | Head | Machine | Slovakia |
| 59 | Jennie Bures | 50 | Wife | No | Slovakia |
| 60 | Edward S Bures | 26 | Son | Salesman | Illinois |
| 61 | Rosalyn M Bures | 23 | Daughter | Office Work | Illinois |
| 62 | Bernadine M Bures | 20 | Daughter | Hair Dresser | Illinois |
| 63 | Blanche E Bourdages | 34 | Head | No | Illinois |
| 64 | Lucian S Bourdages | 34 | Husband | Record Clerk | Illinois |
| 65 | Diane L Bourdages | 4 | Daughter | — | Illinois |
| 66 | Carl E Larson | 33 | Head | Premium Clerk | New York |
| 67 | Virginia E Larson | 26 | Wife | Telephone Operator | Illinois |
| 68 | Nils Hansen | 43 | Head | Electrician | Sweden |
| 69 | Ingeborg G Hansen | 43 | Wife | No | Sweden |
| 70 | John H Hansen | 12 | Son | — | Illinois |
| 71 | Russell L Smith | 30 | Head | Automobile Mechanic | Illinois |
| 72 | Dorothy M Smith | 28 | Wife | No | Illinois |
| 73 | Albert F Brink | 35 | Head | Shipping Clerk | Illinois |
| 74 | Bernice G Brink | 32 | Wife | No | Illinois |
| 75 | Donald G Brink | 5 | Son | — | Illinois |
| 76 | Dorothy J Brink | 1 | Daughter | — | Illinois |
| 77 | Edward E Lookhoff | 33 | Head | Record Clerk | Nebraska |
| 78 | Edward E Lookhoff | 2 | Son | — | Illinois |
| 79 | Lena D Mathieu | 65 | Mother In Law | No | Illinois |
| 80 | Frank J Foley | 27 | Head | Salesman | Illinois |
Pedigree Summary
Thomas + 5 siblings
Gen 1 · 7 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)