MC
Mary Chapman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Brown-County, Ohio
Our Model Tree links this Mary Chapman across the 1920, 1930 and 1940 US Censuses in Brown-County, Ohio (XGBoost, ~Confirmed), with identified parents Albert & Albert — first a daughter (b.~1886), then head of a 2-person household.
Age 54
b. ~1886
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brown-County, Ohio |
| Surname | Chapman |
| Given Name | Mary J |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Union Twp |
| 1935 Residence (County) | Brown |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Union Twp |
| Est. Birth Year | ~1886 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Chapman | Daughter | — | 54 | ~1886 |
| Albert Chapman | Head | — | 73 | ~1867 |
Census Appearances
1920
Brown, Ohio
Daughter, age 34
Brown, Ohio · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Saleswoman |
| Industry | General Store |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Brown, Ohio
Daughter, age 44
Brown, Ohio · implied b. ~1886 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Brown-County, Ohio
Daughter, age 54
Brown-County, Ohio · implied b. ~1886 — 2 household members
| Surname | Chapman |
| Given Name | Mary J |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Union Twp |
| 1935 Residence (County) | Brown |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albert Chapman (~0.92 confidence) and father Albert Chapman (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Chapman
b. ~1866
Source father
● Household
· direct · ~0.92
Father
Albert Chapman
b. ~1867
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Chapman
Daughter · 1940 · age 54 · b. ~1886 · Ohio
★ 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 — Brown-County, Ohio
Open full size
1940 US Federal Census — Brown-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03031-00584)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Homer D Willis | 32 | Head | Manager | West Virginia |
| 2 | Viola Willis | 26 | Wife | — | Ohio |
| 3 | Arleah Willis | 8 | daughter | — | Ohio |
| 4 | Lewis D Lawrence | 70 | Head | — | Ohio |
| 5 | Mary Lawrence | 73 | Wife | — | Ohio |
| 6 | Elizabeth Lawrence | 45 | daughter | — | Ohio |
| 7 | Homer Lawrence | 43 | son | Carpenter | Ohio |
| 8 | Arch B Hicks | 49 | Head | Watchman | Ohio |
| 9 | Nellie Hicks | 50 | Wife | — | Ohio |
| 10 | Helen Hicks | 20 | daughter | — | Ohio |
| 11 | Robert W Hicks | 6 | son | — | Ohio |
| 12 | Joe Hicks | 68 | brother | Farmer | Ohio |
| 13 | Johnson Lightner | 43 | Head | Mechanic | Kentucky |
| 14 | Margaret Lightner | 34 | Wife | — | Kentucky |
| 15 | Donald R Lightner | 8 | son | — | Ohio |
| 16 | Virginia Lightner | 6 | daughter | — | Ohio |
| 17 | Mary Ann Lightner | 4 | daughter | — | Ohio |
| 18 | Kathern Lightner | 2 | daughter | — | Ohio |
| 19 | James Pangburn | 75 | Head | — | Ohio |
| 20 | Alice D Pangburn | 65 | Wife | — | Ohio |
| 21 | Gladys Pangburn | 45 | daughter | Grade Teacher | Ohio |
| 22 | Millard Sloop | 44 | Head | Carpenter | Kentucky |
| 23 | Effie D Sloop | 38 | Wife | — | Kentucky |
| 24 | Letha Sloop | 13 | daughter | — | Ohio |
| 25 | Joe K Owens | 41 | Head | Steel Worker | Kentucky |
| 26 | Irene D Owens | 39 | Wife | — | Kentucky |
| 27 | Dan B D Smith | 41 | Head | Carpenter | Ohio |
| 28 | Gladys Smith | 29 | Wife | — | Kentucky |
| 29 | Minerva D Day | 76 | Head | — | Ohio |
| 30 | Carl Hall | 42 | Head | Machinist | Ohio |
| 31 | Gertrude Hall | 29 | Wife | — | Ohio |
| 32 | Donald Hall | 9 | son | — | Ohio |
| 33 | Roberta Hall | 4 | daughter | — | Ohio |
| 34 | Audrey Hall | 2 | daughter | — | Ohio |
| 35 | Douglas Hall | 1 | son | — | Ohio |
| 36 | Albert Ab Chapman | 73 | Head | Manager | Ohio |
| 37 | Mary J Chapman THIS PERSON | 54 | daughter | — | Ohio |
| 38 | William Marks | 26 | Head | Farmer | Ohio |
| 39 | Margaret Marks | 20 | Wife | — | Ohio |
| 40 | Ronald Marks | 0 | son | — | Ohio |
Pedigree Summary
Mary
Gen 1 · 2 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)