RT
Richard Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Richard Thomas across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 5-person household.
Age 48
b. ~1892
Male
Head
Born: Wales
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thomas |
| Given Name | Richard O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Stock Clerk |
| Industry | Electrician |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
| Occupation | Stock Clerk |
| Township / Ward | Chicago |
| Est. Birth Year | ~1892 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Richard | Age | Birth yr |
|---|---|---|---|---|
| Richard Thomas | Head | — | 48 | ~1892 |
| R Thomas | Son | — | 14 | ~1926 |
| Marvin Thomas | Son | — | 9 | ~1931 |
| Ronald Thomas | Son | — | 12 | ~1928 |
| Margaret Thomas | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Cook, Illinois
Head, age 28
Cook, Illinois · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Richard J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Wales |
| Year of Immigration | 1904 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Carpenter |
| Industry | Outside |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Welsh |
| Home Owned/Rented | R |
| Birth Country | Wales |
| Year of Naturalization | 1915 |
| Birthplace (normalized) | wales |
1930
Cook, Illinois
Head, age 38
Cook, Illinois · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Richard |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 22 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Stockkeeper |
| Industry | Electrical Manufacturing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Welsh |
| Home Owned/Rented | O |
| Home Value / Rent | 18000 |
| Radio Set | R |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1940
Cook-County, Illinois
Head, age 48
Cook-County, Illinois · implied b. ~1892 — 5 household members
| Surname | Thomas |
| Given Name | Richard O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Wales |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Stock Clerk |
| Industry | Electrician |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 266 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
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 Richard Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Richard Thomas
Head · 1940 · age 48 · b. ~1892 · 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-t0627-00994-00151)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard N. Jahnke | 12 | Son | — | Illinois |
| 2 | Joan M. Jahnke | 5 | Daughter | — | Illinois |
| 3 | Alex Fox | 46 | Lodger | Painter | Hungary |
| 4 | Sarah A. Fox | 36 | Lodger | — | Missouri |
| 5 | Victoria Good | 54 | Head | Manager | Poland |
| 6 | Joseph D. Feret | 52 | Brother | — | Poland |
| 7 | James F. Marske | 32 | Head | Electrician | Illinois |
| 8 | Mattie E. Marske | 32 | Wife | Office Work | Michigan |
| 9 | Ella D. Goldrine | 66 | Mother-in-law | — | Sweden |
| 10 | Richard O. Thomas THIS PERSON | 48 | Head | Stock Clerk | Wales |
| 11 | Margaret W. Thomas | 45 | Wife | — | Iowa |
| 12 | R. David J. Thomas | 14 | Son | — | Illinois |
| 13 | Ronald R. Thomas | 12 | Son | — | Illinois |
| 14 | Marvin H. Thomas | 9 | Son | — | Illinois |
| 15 | Robert J. Bennett | 49 | Head | Stationary Engineer | Illinois |
| 16 | Kathryn B. Bennett | 46 | Wife | — | Illinois |
| 17 | Gladys C. Bennett | 23 | Daughter | Nurse | Illinois |
| 18 | Harriett E. Bennett | 15 | Daughter | — | Illinois |
| 19 | Patricia M. Conway | 13 | Step-daughter | — | Illinois |
| 20 | Richard J. Conway | 10 | Step-son | — | Illinois |
| 21 | Joseph C. Mcdonall | 37 | Head | Manager | Illinois |
| 22 | Mae E. Mcdonall | 36 | Wife | — | Illinois |
| 23 | Deloris M. Mcdonall | 11 | Daughter | — | Illinois |
| 24 | Patricia M. Mcdonall | 8 | Daughter | — | Illinois |
| 25 | Joan M. Mcdonall | 6 | Daughter | — | Illinois |
| 26 | Mary Molen | 18 | Lodger | House Work | Mass. |
| 27 | Alfild D. Olsen | 50 | Head | Janitor | Norway |
| 28 | Emma Olsen | 48 | Wife | — | Norway |
| 29 | Arne T. Olsen | 23 | Son | — | Illinois |
| 30 | Myrtle O. Olsen | 21 | Daughter | Office Work | Illinois |
| 31 | Leonard D. Ritchey | 25 | Head | Time Keeper | Illinois |
| 32 | Mary N. Ritchey | 23 | Wife | Office Work | Illinois |
| 33 | Frederick Pastelano | 40 | Head | M.D. Doctor | Illinois |
| 34 | Henrietta Pastelano | 30 | Wife | — | So. Dakota |
| 35 | Delia Cummings | 53 | Head | — | New York |
| 36 | Harold Myers | 40 | Lodger | Truck Driver | Minnesota |
| 37 | Simon Soterkopoulos | 47 | Lodger | Peddler | Greece |
| 38 | Constantine Metichala | 47 | Lodger | Night Cook | Greece |
| 39 | Harry J. Kane | 43 | Head | Policeman | Illinois |
| 40 | Edna B. Kane | 36 | Wife | Teacher | Illinois |
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)