GT
Gertrude Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Gertrude Thomas across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1875), then head of a 4-person household.
Age 65
b. ~1875
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Thomas |
| Given Name | Gertrude |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1875 |
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 Gertrude | Age | Birth yr |
|---|---|---|---|---|
| Thomas Thomas | Head | — | 69 | ~1871 |
| Gertrude Thomas | Spouse | — | 65 | ~1875 |
| Gladys Wright | Other | — | 51 | ~1889 |
| Ben Thomas | Son | — | 44 | ~1896 |
Census Appearances
1920
Sangamon, Illinois
Spouse, age 45
Sangamon, Illinois · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Gertrude |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Other, age 54
Sangamon, Illinois · implied b. ~1876 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Gertrude |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 17 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Spouse, age 65
Sangamon-County, Illinois · implied b. ~1875 — 4 household members
| Surname | Thomas |
| Given Name | Gertrude |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Highest Grade | 8 |
| 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 Gertrude 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
Gertrude Thomas
Spouse · 1940 · age 65 · b. ~1875 · 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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00886-00434)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Norma Patton | 7 | Daughter | — | Illinois |
| 2 | Frank Ludwig | 25 | Head | Salesman | Illinois |
| 3 | Mary Ludwig | 23 | Wife | — | Illinois |
| 4 | Ralph Coats | 26 | Head | Hoisting Engineer | Missouri |
| 5 | Ella Coats | 22 | Wife | — | Illinois |
| 6 | Wanda Coats | 4 | Daughter | — | Illinois |
| 7 | Ralph Coats | 3 | Son | — | Illinois |
| 8 | Hugh Carner | 56 | Head | Engineer | Illinois |
| 9 | Allie Carner | 60 | Wife | — | Illinois |
| 10 | John Carner | 14 | Son | — | Illinois |
| 11 | Vern Kinney | 47 | Head | Retail Furniture Salesman | Illinois |
| 12 | Ruth Kinney | 46 | Wife | Cook | Illinois |
| 13 | Harriet Kinney | 14 | Daughter | — | Illinois |
| 14 | Myrtle Workman | 56 | Aunt | — | Nebraska |
| 15 | Joseph Hertel | 64 | Head | Letter Carrier | Illinois |
| 16 | Grace Hertel | 58 | Wife | — | Illinois |
| 17 | Lydia Jacobs | 61 | Sister-in-law | — | Illinois |
| 18 | Ralph Johnson | 56 | Head | Asst. Custodian | Illinois |
| 19 | Essie Johnson | 53 | Wife | — | Illinois |
| 20 | Elston Johnson | 23 | Son | Deliveryman | Illinois |
| 21 | Thomas Thomas | 69 | Head | — | Illinois |
| 22 | Gertrude Thomas THIS PERSON | 65 | Wife | — | Illinois |
| 23 | Ben J. Thomas | 44 | Son | Retail Salesman | Illinois |
| 24 | Gladys Wright | 51 | Sister-in-law | Practical Nurse | Illinois |
| 25 | O. M. Kirk | 56 | Head | Farmer | Illinois |
| 26 | Flora Kirk | 24 | Wife | Stenographer | Illinois |
| 27 | Hundley, W. Hundley | 24 | Head | Wheat Shoveler | Illinois |
| 28 | Kathryn Hundley | 23 | Wife | — | Illinois |
| 29 | John Snodgrass | 57 | Head | Salesman | Illinois |
| 30 | Julianna Snodgrass | 57 | Wife | — | Illinois |
| 31 | Marguerite Snodgrass | 30 | Daughter | Stenographer | Illinois |
| 32 | Allen Snodgrass | 27 | Son | Laborer | Illinois |
| 33 | William Schleber | 72 | Head | — | Illinois |
| 34 | Daniel Schleber | 62 | Brother | Laborer | Illinois |
| 35 | Wrong Informed | None | — | — | — |
| 36 | — | None | — | — | — |
| 37 | Ross Littman | 44 | Head | Messenger | Illinois |
| 38 | Frances Littman | 45 | Wife | — | Illinois |
| 39 | Rosalie Littman | 19 | Daughter | — | Illinois |
| 40 | Walter Littman | 16 | Son | — | 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)