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Mary Thornton — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Brown-County, Illinois
Our Model Tree links this Mary Thornton across the 1930 and 1940 US Censuses in Brown-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brown-County, Illinois |
| Surname | Thornton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt. Sterling City |
| 1935 Residence (County) | Brown |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Mt Sterling City |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Carol Thornton | Daughter | — | 2 | ~1938 |
| Patricia Thornton | Daughter | — | 9 | ~1931 |
| Helen Thornton | Daughter | — | 12 | ~1928 |
| Mary Thornton | Daughter | — | 13 | ~1927 |
| Elizabeth Thornton | Daughter | — | 3 | ~1937 |
| Charles Thornton | Head | — | 42 | ~1898 |
| Roger Thornton | Son | — | 4 | ~1936 |
| Nettie Thornton | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Brown, Illinois
Other, age 3
Brown, Illinois · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thornton |
| Given Name | Mary |
| Relationship to Head | Dau |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Brown-County, Illinois
Daughter, age 13
Brown-County, Illinois · implied b. ~1927 — 8 household members
| Surname | Thornton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt. Sterling City |
| 1935 Residence (County) | Brown |
| Highest Grade | 7 |
| 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 Mary Thornton across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Thornton
Daughter · 1940 · age 13 · b. ~1927 · Illinois
★ You are viewing this record
Sibling
Roger Thornton
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Thornton
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Thornton
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Thornton
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Thornton
Sibling · 1940 · age 9
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 — Brown-County, Illinois
Open full size
1940 US Federal Census — Brown-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00761-00137)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Kerr | 46 | Head | Maid | Illinois |
| 2 | Maude Kerr | 44 | Sister | Maid | Illinois |
| 3 | Rose Neylan | 68 | Head | — | Illinois |
| 4 | Patrick D. Cronin | 78 | Head | — | Illinois |
| 5 | Charles Thornton | 42 | Head | Proprietor | Illinois |
| 6 | Nettie Thornton | 42 | Wife | — | Illinois |
| 7 | Mary Thornton THIS PERSON | 13 | Daughter | — | Illinois |
| 8 | Helen Thornton | 12 | Daughter | — | Illinois |
| 9 | Patricia Thornton | 9 | Daughter | — | Illinois |
| 10 | Roger Thornton | 4 | Son | — | Illinois |
| 11 | Elizabeth Thornton | 3 | Daughter | — | Illinois |
| 12 | Carol Sue Thornton | 2 | Daughter | — | Illinois |
| 13 | Eugene Fry | 63 | Head | Cook | Illinois |
| 14 | Belle Fry | 53 | Wife | Cashier | Illinois |
| 15 | Albert Reich | 59 | Head | Bricklayer | Illinois |
| 16 | Mamie Reich | 51 | Wife | — | Illinois |
| 17 | Gerald Reich | 14 | Son | — | Illinois |
| 18 | Thomas Langan | 72 | Head | — | Illinois |
| 19 | Josephine Langan | 69 | Wife | — | Illinois |
| 20 | John Langan | 31 | Son | Clerk | Illinois |
| 21 | Anthony Schoonhoven | 41 | Head | Proprietor | Illinois |
| 22 | Laura Schoonhoven | 40 | Wife | — | Illinois |
| 23 | Marjorie Schoonhoven | 12 | Daughter | — | Illinois |
| 24 | John J. Mcgovern | 73 | Head | City Clerk | Canada-Eng |
| 25 | Georgia Mcgovern | 75 | Sister | — | Canada-Eng |
| 26 | Nolan, Katherine Mcgovern | 65 | Sister | — | Illinois |
| 27 | James Mclean | 12 | Grandson | — | Missouri |
| 28 | A. J. Rodolf | 47 | Head | Tinner | Illinois |
| 29 | Anna Rodolf | 36 | Wife | — | Illinois |
| 30 | Joan Rodolf | 13 | Daughter | — | Illinois |
| 31 | John Rodolf | 4 | Son | — | Illinois |
| 32 | Orpha E. Perry | 54 | Head | Seamstress | Illinois |
| 33 | John Butler | 76 | Head | — | Illinois |
| 34 | Mary Ann Butler | 74 | Wife | — | Illinois |
| 35 | Hattie Heerman | 63 | Head | — | Illinois |
| 36 | Ed Tesfey | 54 | Head | Partner In Store & Legislator | Illinois |
| 37 | Loretta Tesfey | 49 | Wife | — | Illinois |
| 38 | Daniel Tesfey | 16 | Son | — | Illinois |
| 39 | Carolyn Tesfey | 10 | Daughter | — | 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)