FT
Fred Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Fred Thomas across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Elizabeth — first a head (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thomas |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Printer |
| Industry | Book Binders |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 310 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Printer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Fred | Age | Birth yr |
|---|---|---|---|---|
| Fred Thomas | Head | — | 28 | ~1912 |
| Ira Finlinson | Other | — | 42 | ~1898 |
| Charles Thomas | Son | — | 4 | ~1936 |
| Thomas Thomas | Son | — | 2 | ~1938 |
| Clark Thomas | Son | — | 6 | ~1934 |
| Bernice Thomas | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Cook, Illinois
Son, age 9
Cook, Illinois · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Frederick |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 19
Cook, Illinois · implied b. ~1911 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Apprentice |
| Industry | Printer |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 28
Cook-County, Illinois · implied b. ~1912 — 6 household members
| Surname | Thomas |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Printer |
| Industry | Book Binders |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 310 |
| 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 Fred Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Thomas (~0.92 confidence) and mother Elizabeth Thomas (~0.92 confidence) and father John Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Thomas
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
John Thomas
b. ~1871
Source father
● Household
· direct · ~0.92
This person
Anchor record
Fred Thomas
Head · 1940 · age 28 · b. ~1912 · Illinois
★ You are viewing this record
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-t0627-00940-00199)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arnold Haenke | 46 | Head | Foreman | Wisconsin |
| 42 | Ruth Haenke | 36 | Wife | — | Illinois |
| 43 | Arnold Haenke | 16 | Son | — | Illinois |
| 44 | David Haenke | 12 | Son | — | Illinois |
| 45 | Ernest Heimann | 46 | Head | Salesman | Illinois |
| 46 | Frieda Heimann | 44 | Wife | — | Illinois |
| 47 | Lois Heimann | 16 | Dtr | — | Illinois |
| 48 | Alexander Scott | 32 | Head | Pattern Mkr | Illinois |
| 49 | Rose Scott | 31 | Wife | — | New York |
| 50 | Frank Kolosh | 38 | Head | Clerk | Illinois |
| 51 | Josephine Kolosh | 32 | Wife | — | Illinois |
| 52 | James Kolosh | 7 | Son | — | Illinois |
| 53 | Fred Thomas THIS PERSON | 28 | Head | Printer | Illinois |
| 54 | Bernice Thomas | 26 | Wife | Saleslady | Illinois |
| 55 | Clark Thomas | 6 | Son | — | Illinois |
| 56 | Charles Thomas | 4 | Son | — | Illinois |
| 57 | Thomas Thomas | 2 | Son | — | Illinois |
| 58 | Ira Finlinson | 42 | Sister in L | — | Wisconsin |
| 59 | Joseph Katzen | 40 | Head | Salesman | Illinois |
| 60 | Sarah Katzen | 37 | Wife | — | Illinois |
| 61 | Marilyn Katzen | 9 | Dtr | — | Illinois |
| 62 | Leon Katzen | 6 | Son | — | Illinois |
| 63 | Fred H. Tuck | 56 | Head | Detective | Illinois |
| 64 | Josephine C. Tuck | 53 | Wife | — | So. Dakota |
| 65 | Arthur Johnson | 46 | Head | Draftsman | Illinois |
| 66 | Albertina Johnson | 75 | Mother | — | Sweden |
| 67 | Laura Hemmel | 49 | Sister | — | Illinois |
| 68 | Lorraine Hemmel | 20 | Niece | Office Mgr | Illinois |
| 69 | Essie Weaver | 42 | Sister | Clerk | Illinois |
| 70 | Douglas Weaver | 21 | Nephew | Clerk In Parts | Illinois |
| 71 | Cornelius Kase | 48 | Head | Auto Parts | Illinois |
| 72 | Jennie Kase | 44 | Wife | — | Illinois |
| 73 | Betty Corinne Kase | 15 | Dtr | — | Illinois |
| 74 | Martha Brunshweiler | 39 | Sister in L | House Maid | Illinois |
| 75 | Carol Jean Brunshweiler | 5 | Niece | — | Illinois |
| 76 | Frank T. Davis | 38 | Head | Accountant | Illinois |
| 77 | Evelyn M. Davis | 35 | Wife | Book Keeping | Illinois |
| 78 | George Nystrom | 64 | Head | Brick-Maker | Sweden |
| 79 | Hannah Nystrom | 59 | Wife | — | Sweden |
| 80 | Alice Nystrom | 32 | Dtr | Stenographer | Illinois |
Pedigree Summary
Fred
Gen 1 · 3 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)