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Gertrude Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Adams-County, Illinois
Our Model Tree links this Gertrude Thomas across the 1930 and 1940 US Censuses in Adams-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 9-person household.
Age 29
b. ~1911
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Adams-County, Illinois |
| Surname | Thomas |
| Given Name | Gertrude A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Quincy |
| 1935 Residence (County) | Adams |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Illinois |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Stenographer |
| Township / Ward | Quincy |
| Est. Birth Year | ~1911 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Gertrude | Age | Birth yr |
|---|---|---|---|---|
| Joseph Thomas | Son | — | 22 | ~1918 |
| Mary Thomas | Daughter | — | 8 | ~1932 |
| Gertrude Thomas | Daughter | — | 29 | ~1911 |
| Fred Thomas | Son | — | 15 | ~1925 |
| James Thomas | Son | — | 6 | ~1934 |
| Catherine Thomas | Spouse | — | 53 | ~1887 |
| George Thomas | Head | — | 57 | ~1883 |
| Kenneth Thomas | Son | — | 19 | ~1921 |
| Helen Thomas | Daughter | — | 26 | ~1914 |
Census Appearances
1930
Adams, Illinois
Daughter, age 19
Adams, Illinois · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Gertrude A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Illinois |
| Occupation | Stenographer |
| Industry | Stock Meds |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Adams-County, Illinois
Daughter, age 29
Adams-County, Illinois · implied b. ~1911 — 9 household members
| Surname | Thomas |
| Given Name | Gertrude A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Quincy |
| 1935 Residence (County) | Adams |
| Occupation | Stenographer |
| Industry | Dept. Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H 4 |
| 1935 Residence | Illinois |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Gertrude Thomas
Daughter · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Mary Thomas
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Thomas
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Thomas
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Thomas
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Thomas
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Thomas
Sibling · 1940 · age 22
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 — Adams-County, Illinois
Open full size
1940 US Federal Census — Adams-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00757-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Fife | 65 | Head | Utility Man | Canada |
| 2 | Maud E. Fife | 62 | Wife | — | Illinois |
| 3 | Susie Fife | 37 | Daughter | Waitress | Illinois |
| 4 | Walter Fife | 21 | Son | — | Illinois |
| 5 | Bernard Beaty | 31 | Head | Mechanic | Illinois |
| 6 | Regina Beaty | 27 | Wife | — | Missouri |
| 7 | Bonnell Beaty | 7 | Daughter | — | Missouri |
| 8 | Lucinda L. Beaty | 3 | Daughter | — | Illinois |
| 9 | John Keller | 69 | Head | — | Illinois |
| 10 | Mary Keller | 68 | Wife | — | Illinois |
| 11 | George Keller | 27 | Head | Meat Cutter | Illinois |
| 12 | Jean Keller | 25 | Wife | — | Illinois |
| 13 | George Keller | 4 | Son | — | Illinois |
| 14 | William Rueter | 79 | Head | — | Germany |
| 15 | Catherine Rueter | 65 | Wife | — | Illinois |
| 16 | Raymond A. Rueter | 27 | Son | Shipping Clerk | Illinois |
| 17 | Eleanor Rueter | 25 | Daughter | Seamstress | Illinois |
| 18 | Norbert Rueter | 23 | Son | Carpenter | Illinois |
| 19 | George J. Thomas | 57 | Head | Janitor | Missouri |
| 20 | Catherine Thomas | 53 | Wife | — | Illinois |
| 21 | Gertrude A. Thomas THIS PERSON | 29 | Daughter | Stenographer | Missouri |
| 22 | Helen A. Thomas | 26 | Daughter | Stenographer | Missouri |
| 23 | Joseph Thomas | 22 | Son | Office Clerk | Missouri |
| 24 | Kenneth Thomas | 19 | Son | — | Missouri |
| 25 | Fred Thomas | 15 | Son | — | Missouri |
| 26 | Mary Ann Thomas | 8 | Daughter | — | Illinois |
| 27 | James Thomas | 6 | Son | — | Illinois |
| 28 | Robert Berndanner | 32 | Head | Laborer | Illinois |
| 29 | Clarey Berndanner | 32 | Wife | — | Missouri |
| 30 | Emma Berndanner | 13 | Daughter | — | Illinois |
| 31 | Evelyn Berndanner | 12 | Daughter | — | Illinois |
| 32 | Loretta Berndanner | 9 | Daughter | — | Missouri |
| 33 | Arthur Defaner | 52 | Head | Carpenter | Illinois |
| 34 | Walter Defaner | 55 | Brother | — | Illinois |
| 35 | William Defaner | 35 | Brother | Salesman | Illinois |
| 36 | Rose Wellmann | 43 | Sister | — | Illinois |
| 37 | Marie Wellmann | 22 | Niece | Stenographer | Illinois |
| 38 | Betty Lee Wellmann | 22 | Niece | — | Illinois |
| 39 | Jacquelyn Wellmann | 15 | Niece | — | 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)