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Mary Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this Mary Leonard across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 3-person household.
Age 51
b. ~1889
Female
Spouse
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Leonard |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Dayton |
| Est. Birth Year | ~1889 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Leonard | Daughter | — | 30 | ~1910 |
| Charles Leonard | Head | — | 54 | ~1886 |
| Mary Leonard | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Montgomery, Ohio
Spouse, age 30
Montgomery, Ohio · implied b. ~1890 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Indiana |
| Naturalization Status | Naturalized |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Montgomery, Ohio
Other, age 41
Montgomery, Ohio · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 19 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Montgomery-County, Ohio
Spouse, age 51
Montgomery-County, Ohio · implied b. ~1889 — 3 household members
| Surname | Leonard |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Dayton |
| 1935 Residence (County) | Montgomery |
| Hours Worked | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leonard
Spouse · 1940 · age 51 · b. ~1889 · Ohio
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03256-00232)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Raymond Carlson | 17 | Head | — | Ohio |
| 2 | Ruth Carlson | 16 | Daughter | — | Ohio |
| 3 | Mary Carlson | 72 | Mother | — | Ohio |
| 4 | Lyman Reinhardt | 31 | Head | Office Clerk | Ohio |
| 5 | Bernice Reinhardt | 29 | Wife | Secretary | Ohio |
| 6 | Burke Manley | 34 | Head | Foreman | W. Virginia |
| 7 | Ruth Manley | 34 | Wife | — | Ohio |
| 8 | Henry Middleton | 27 | Brother | Shipping Room Clerk | W. Virginia |
| 9 | Archie Melody | 43 | Head | Airplane Inspector | Nevada |
| 10 | Olive Melody | 35 | Wife | — | Ohio |
| 11 | Walter Schlea | 31 | Head | Maintenance Man | Ohio |
| 12 | Marjorie Schlea | 27 | Wife | — | Ohio |
| 13 | Gynnder Schlea | 3 | Daughter | — | Ohio |
| 14 | Larry Schlea | 2 | Son | — | Ohio |
| 15 | Herman Underthun | 29 | Head | Manager Salesman | Ohio |
| 16 | Freida Underthun | 32 | Wife | — | Nebraska |
| 17 | Herman Underthun | 3 | Son | — | Ohio |
| 18 | Frank Smith | 49 | Head | Tool Room Attendant | Ohio |
| 19 | Bessie Smith | 40 | Wife | — | Ohio |
| 20 | Ellen Smith | 21 | Daughter | Saleslady | Ohio |
| 21 | Frank Smith | 17 | Son | — | Ohio |
| 22 | William Hussong | 45 | Head | Part Owner | Ohio |
| 23 | Florence Hussong | 41 | Wife | — | Ohio |
| 24 | Woodrow Hussong | 20 | Son | Retail Salesman | Ohio |
| 25 | Leona Hussong | 18 | Daughter | — | Ohio |
| 26 | Phillip Hussong | 9 | Daughter | — | Ohio |
| 27 | Ling | 22 | Brother | Retail Salesman | Ohio |
| 28 | Charles Leonard | 54 | Head | Machinist | Ohio |
| 29 | Mary Leonard THIS PERSON | 51 | Wife | — | Indiana |
| 30 | Margaret Leonard | 30 | Daughter | Typist | Ohio |
| 31 | Meng | 56 | Head | Wholesale Delivery Route | Ohio |
| 32 | Katherine Meng | 55 | Wife | — | Missouri |
| 33 | Earl Boen | 33 | Head | Dairy Owner | Kentucky |
| 34 | Lovetta Boen | 33 | Wife | Office Worker | Ohio |
| 35 | Bradley Boen | 4 | Son | — | Ohio |
| 36 | Reva Strickler | 23 | Lodger | Servant | Ohio |
| 37 | Ralph Burdz | 29 | Head | Tool Designer | Ohio |
| 38 | Eileen Burdz | 28 | Wife | — | Ohio |
| 39 | Rita Burdz | 2 | Daughter | — | Ohio |
Related Census Records
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)