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Mildred Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rock-Island-County, Illinois
Our Model Tree links this Mildred Thomas across the 1920, 1930 and 1940 US Censuses in Rock-Island-County, Illinois (XGBoost, ~Confirmed), with identified parents Ben & Benjamin — first a daughter (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rock-Island-County, Illinois |
| Surname | Thomas |
| Given Name | Mildred |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mercer |
| 1935 Residence (County) | Rock Island |
| Additional Details | |
| Occupation | Receiving clerk |
| Industry | Retail Department Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 226 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Receiving Clerk |
| Township / Ward | Mercer |
| Est. Birth Year | ~1914 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mildred | Age | Birth yr |
|---|---|---|---|---|
| Mildred Thomas | Daughter | — | 26 | ~1914 |
| Ben Thomas | Head | — | 53 | ~1887 |
| Matilda Thomas | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Rock Island, …
Daughter, age 6
Rock Island, Illinois · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mildred |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Daughter, age 16
Rock Island, Illinois · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Mildred M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Rock-Island-County, Illinois
Daughter, age 26
Rock-Island-County, Illinois · implied b. ~1914 — 3 household members
| Surname | Thomas |
| Given Name | Mildred |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mercer |
| 1935 Residence (County) | Rock Island |
| Occupation | Receiving clerk |
| Industry | Retail Department Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 226 |
| Highest Grade | Hs 4 |
| 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 Mildred Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ben Thomas (~0.92 confidence) and father Benjamin Thomas (~0.92 confidence) and father Benjamin Thomas (~0.92 confidence) and mother Matilda Thomas (~0.92 confidence) and mother Matilda Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ben Thomas
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Benjamin Thomas
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Benjamin Thomas
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Matilda Thomas
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Matilda Thomas
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mildred Thomas
Daughter · 1940 · age 26 · b. ~1914 · 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 — Rock-Island-County, Illinois
Open full size
1940 US Federal Census — Rock-Island-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00875-00027)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bergo, Anotquee Berge | 7 | daughter | — | Illinois |
| 42 | Charles Savantik | 55 | Husband | Plater | Poland |
| 43 | Mary Savantik | 50 | wife | — | Poland |
| 44 | Tillia Savantik | 24 | daughter | Selectady | Illinois |
| 45 | Claire Savantik | 22 | daughter | Machine Operator | Illinois |
| 46 | Lucas Irene Savantik | 11 | niece | — | Illinois |
| 47 | John Gustafson | 24 | Head | Welder | Illinois |
| 48 | Margaret Gustafson | 21 | Wife | — | Aledo |
| 49 | John Gustafson | 1 | Son | — | Illinois |
| 50 | Anna Gustafson | 54 | mother | Proprietor | Sweden |
| 51 | Velma Gustafson | 20 | sister | Waitress | Illinois |
| 52 | Glen Courtney | 39 | Head | Laborer | Illinois |
| 53 | Velda Courtney | 24 | wife | — | Iowa |
| 54 | Earl Courtney | 21 | nephew | Laborer | Iowa |
| 55 | Ben H. Thomas | 53 | Head | Fireman | Pennsylvania |
| 56 | Matilda Thomas | 50 | wife | — | Illinois |
| 57 | Mildred Thomas THIS PERSON | 26 | daughter | Receiving Clerk | Illinois |
| 58 | Fred Abert | 32 | Head | Truck Driver | Illinois |
| 59 | Dorothy Abert | 25 | wife | — | Illinois |
| 60 | Leonall Abert | 0 | Son | — | Illinois |
| 61 | Herman Valstrand | 38 | Head | Machinist Helper | Illinois |
| 62 | Gladys Valstrand | 26 | wife | — | Illinois |
| 63 | Sharon Valstrand | 2 | daughter | — | Illinois |
| 64 | Jasper Raroads | 51 | Head | Painter | Virginia |
| 65 | Augusta Raroads | 55 | wife | — | Illinois |
| 66 | Harold Fletcher | 24 | Head | Gasoline Filling Station | Iowa |
| 67 | Helen Fletcher | 19 | wife | — | Kansas |
| 68 | Lewis James | 52 | Head | Assembler | Indiana |
| 69 | Cora J. James | 62 | wife | Seamstress | North Carolina |
| 70 | Medert Breckaert | 48 | Head | Butcher | Belgium |
| 71 | Bertha Breckaert | 44 | wife | — | Belgium |
| 72 | Mary Breckaert | 18 | daughter | — | Illinois |
| 73 | Lois Breckaert | 12 | daughter | — | Illinois |
| 74 | Elmer Schweitert | 39 | Head | Baker | Iowa |
| 75 | Margaret Schweitert | 37 | wife | — | Illinois |
| 76 | John Halla | 13 | step-son | — | Illinois |
| 77 | Mary Lou Halla | 10 | step-daughter | — | Illinois |
| 78 | J. Samuel Nelson | 67 | Head | — | Illinois |
| 79 | Elizabeth Nelson | 57 | Sister | — | Illinois |
| 80 | Stanley Pilichowski | 58 | Head | Fireman | Poland |
Related Census Records
Pedigree Summary
Mildred
Gen 1 · 5 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)