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Lillian Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Lillian Thompson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thompson |
| Given Name | Lillian |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | assembler |
| Industry | Radio Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 351 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Assembler |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1920 |
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 Lillian | Age | Birth yr |
|---|---|---|---|---|
| Elmer Thompson | Son | — | 8 | ~1932 |
| Lillian Thompson | Daughter | — | 20 | ~1920 |
| Andrew Thompson | Head | — | 49 | ~1891 |
| Vivian Thompson | Daughter | — | 18 | ~1922 |
| Kenneth Thompson | Son | — | 5 | ~1935 |
| Eleanor Thompson | Daughter | — | 16 | ~1924 |
| Donald Thompson | Son | — | 7 | ~1933 |
| Marion Thompson | Spouse | — | 48 | ~1892 |
| Mary Thompson | Daughter | — | 15 | ~1925 |
| Herbert Thompson | Son | — | 9 | ~1931 |
Census Appearances
1930
Cook, Illinois
Daughter, age 10
Cook, Illinois · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 20
Cook-County, Illinois · implied b. ~1920 — 10 household members
| Surname | Thompson |
| Given Name | Lillian |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | assembler |
| Industry | Radio Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 351 |
| 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 Lillian Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lillian Thompson
Daughter · 1940 · age 20 · b. ~1920 · Illinois
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Sibling
Herbert Thompson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Thompson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Thompson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Thompson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Thompson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Thompson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elmer Thompson
Sibling · 1940 · age 8
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-t0627-00990-00044)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leo Ulandowski | 34 | son | Press Man | Illinois |
| 2 | Alex Ulandowski | 32 | son | Mechanic | Illinois |
| 3 | John Bernblau | 47 | head | Research Assistant | Illinois |
| 4 | Angeline Bernblau | 44 | wife | — | Illinois |
| 5 | Angeline Bernblau | 25 | daughter | Receptionist | Illinois |
| 6 | Mary Bernblau | 22 | daughter | File Clerk | Illinois |
| 7 | Henrietta Bernblau | 20 | daughter | Operator | Illinois |
| 8 | Olga Bernblau | 18 | daughter | — | Illinois |
| 9 | Joan Bernblau | 3 | daughter | — | Illinois |
| 10 | Catherine Mcdonough | 47 | head | — | Poland |
| 11 | Michael Mcdonough | 21 | son | Mail Clerk | Illinois |
| 12 | Richard Mcdonough | 23 | son | Machinist | Illinois |
| 13 | Casimir Pasquaki | 54 | head | Caster | Poland |
| 14 | Josephine Pasquaki | 52 | wife | — | Poland |
| 15 | Jessie Pasquaki | 27 | daughter | Dipper | Illinois |
| 16 | Ignatius Pasquaki | 25 | son | Polisher | Illinois |
| 17 | Mary Pasquaki | 16 | daughter | Washer Dishes | Illinois |
| 18 | Tony Pasquaki | 15 | son | — | Illinois |
| 19 | Andrew Thompson | 49 | head | Chief Clerk | Norway |
| 20 | Marion Thompson | 48 | wife | Radio Mfg Co | Norway |
| 21 | Lillian Thompson THIS PERSON | 20 | daughter | Assembler | Illinois |
| 22 | Vivian Thompson | 18 | daughter | Housework | Illinois |
| 23 | Eleanor Thompson | 16 | daughter | — | Illinois |
| 24 | Mary Thompson | 15 | daughter | — | Illinois |
| 25 | Herbert Thompson | 9 | son | — | Illinois |
| 26 | Elmer Thompson | 8 | son | — | Illinois |
| 27 | Donald Thompson | 7 | son | — | Illinois |
| 28 | Kenneth Thompson | 5 | son | — | Illinois |
| 29 | Andrew Skoraczewski | 44 | head | Lithographer | Poland |
| 30 | Mary Skoraczewski | 40 | wife | — | Illinois |
| 31 | Virginia Skoraczewski | 15 | daughter | — | Illinois |
| 32 | Dorothy Skoraczewski | 14 | daughter | — | Illinois |
| 33 | Robert Skoraczewski | 9 | son | — | Illinois |
| 34 | Walter Guthaus | 45 | head | Machinist | Illinois |
| 35 | Margaret Guthaus | 41 | wife | — | Illinois |
| 36 | Shirley Guthaus | 18 | daughter | New Worker | Illinois |
| 37 | Jerome Guthaus | 17 | son | New Worker | Illinois |
| 38 | Thomas Guthaus | 10 | daughter | — | Illinois |
| 39 | Robert Guthaus | 6 | son | — | Illinois |
| 40 | Charles Ball | 62 | head | — | Kansas |
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)