PT
Pearl Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Pearl Thomas across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Clara & Clara — first a daughter (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | beauty operator |
| Industry | beauty shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 897 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Beauty Operator |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1915 |
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 Pearl | Age | Birth yr |
|---|---|---|---|---|
| Grace Thomas | Daughter | — | 16 | ~1924 |
| John Thomas | Head | — | 53 | ~1887 |
| Clara Thomas | Spouse | — | 54 | ~1886 |
| George Thomas | Son | — | 18 | ~1922 |
| Pearl Thomas | Daughter | — | 25 | ~1915 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 5 household members
| Surname | Thomas |
| Given Name | Pearl |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | beauty operator |
| Industry | beauty shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 897 |
| 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 Pearl Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Clara Thomas (~0.92 confidence) and mother Clara 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
Mother
Clara Thomas
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Clara Thomas
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
John Thomas
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
Pearl Thomas
Daughter · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Grace Thomas
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Thomas
Sibling · 1940 · age 18
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-t0627-00940-00179)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Thomas | 53 | Head | Car Inspector | Wisconsin |
| 42 | Clara Thomas | 54 | Wife | — | Wisconsin |
| 43 | Pearl Thomas THIS PERSON | 25 | Daughter | Beauty Operator | Illinois |
| 44 | George Thomas | 18 | Son | — | Illinois |
| 45 | Grace Thomas | 16 | Daughter | — | Illinois |
| 46 | Harry Rosen | 29 | Head | Retail Salesman | Illinois |
| 47 | Harriet A. Rosen | 25 | Wife | — | Ohio |
| 48 | Raymond Hickock | 30 | Head | Beverage Salesman | Illinois |
| 49 | Sarah A. Hickock | 25 | Wife | — | Illinois |
| 50 | Raymond Hickock | 4 | Son | — | Illinois |
| 51 | Shirley Hickock | 2 | Daughter | — | Illinois |
| 52 | Robert Kress | 43 | Head | Pharmacist | Indiana |
| 53 | Harriett Kress | 40 | Wife | — | Illinois |
| 54 | Wade H. Nichols | 56 | Head | General Agent | Alabama |
| 55 | Ora Nichols | 55 | Wife | — | Georgia |
| 56 | John Gridley | 50 | Head | Asst Superintendent | Wisconsin |
| 57 | Myrtle Gridley | 48 | Wife | — | Illinois |
| 58 | Chester Dursma | 46 | Head | Dental Surgeon | Michigan |
| 59 | Angeline Dursma | 43 | Wife | — | Iowa |
| 60 | Cynthia Dursma | 20 | Daughter | — | North Dakota |
| 61 | Rosemary Dursma | 16 | Daughter | — | North Dakota |
| 62 | Ralph A. Neff | 68 | Head | School Teacher | Iowa |
| 63 | Meryn Neff | 45 | Wife | — | Wisconsin |
| 64 | Fredrick R. Bennett | 37 | Head | Doctor | Wisconsin |
| 65 | Agnes Bennett | 36 | Wife | — | Wisconsin |
| 66 | John Jones | 59 | Head | Sales Manager | Iowa |
| 67 | Alice G. Jones | 58 | Wife | — | Iowa |
| 68 | John W. Jones | 29 | Son | Livestock Buyer | Illinois |
| 69 | Robert Jones | 2 | Grandson | — | Iowa |
| 70 | Jessie Smith | 52 | Head | Nurse | Scotland |
| 71 | Catherine Mccarthy | 29 | Boarder | Supervisor | Wisconsin |
| 72 | Ethel H. Dempsey | 56 | Head | School Teacher | Iowa |
| 73 | Mariam Dempsey | 18 | Daughter | — | Illinois |
| 74 | Harry Le Fort | 45 | Head | Pullman Conductor | Illinois |
| 75 | Louise Le Fort | 43 | Wife | — | Illinois |
| 76 | Helen Jane Freer | 17 | Daughter | — | Illinois |
| 77 | John Le Fort | 23 | Head | — | Illinois |
| 78 | Lucy Le Fort | 23 | Wife | — | Illinois |
| 79 | Margaret Springe | 38 | Head | School Teacher | Illinois |
| 80 | Mother Springe | 72 | Mother | — | Germany |
Pedigree Summary
Pearl + 2 siblings
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)