MF
Mary Farmer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lucas-County, Ohio
Our Model Tree links this Mary Farmer across the 1930 and 1940 US Censuses in Lucas-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Ohio |
| Surname | Farmer |
| Given Name | Mary Jane |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo City |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Toledo City |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Farmer | Daughter | — | 12 | ~1928 |
| Julia Farmer | Daughter | — | 3 | ~1937 |
| Julia Farmer | Spouse | — | 37 | ~1903 |
| Raphael Farmer | Head | — | 37 | ~1903 |
| Marguerite Farmer | Daughter | — | 7 | ~1933 |
| Patricia Farmer | Daughter | — | 9 | ~1931 |
| Carol Farmer | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Wood, Ohio
Daughter, age 2
Wood, Ohio · implied b. ~1928 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farmer |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Lucas-County, Ohio
Daughter, age 12
Lucas-County, Ohio · implied b. ~1928 — 7 household members
| Surname | Farmer |
| Given Name | Mary Jane |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo City |
| 1935 Residence (County) | Lucas |
| Class of Worker | 0 |
| Highest Grade | 6 |
| 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 Farmer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Farmer
Daughter · 1940 · age 12 · b. ~1928 · Ohio
★ You are viewing this record
Sibling
Carol Farmer
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Farmer
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Farmer
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Farmer
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 — Lucas-County, Ohio
Open full size
1940 US Federal Census — Lucas-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03262-00755)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth E. Van Syoc | 31 | wife | — | Illinois |
| 2 | James R. Van Syoc | 6 | son | — | — |
| 3 | Charles E. Van Syoc | 3 | daughter | — | — |
| 4 | Alpheus F. Wentzel | 31 | head | Chemist | Wisconsin |
| 5 | Virginia Wentzel | 27 | wife | — | Wisconsin |
| 6 | Carl Wentzel | 1 | son | — | — |
| 7 | Helen G. Bigelow | 51 | head | — | Illinois |
| 8 | Lawrence W. Green | 37 | head | Machinist | Ohio |
| 9 | Gertrude R. Green | 34 | wife | — | Ohio |
| 10 | Dorothy G. Green | 13 | daughter | — | Ohio |
| 11 | William L. Green | 5 | son | — | — |
| 12 | William G. Wilson | 47 | head | Machinist | Ohio |
| 13 | Florence M. Wilson | 46 | wife | — | Ohio |
| 14 | Raphael M. Farmer | 37 | head | Pipe-Fitter | Ohio |
| 15 | Julia Farmer | 37 | wife | — | Czechoslovakia |
| 16 | Mary Jane Farmer THIS PERSON | 12 | daughter | — | Ohio |
| 17 | Patricia R. Farmer | 9 | daughter | — | Ohio |
| 18 | Marguerite T. Farmer | 7 | daughter | — | Ohio |
| 19 | Carol C. Farmer | 5 | daughter | — | — |
| 20 | Julia A. Farmer | 3 | daughter | — | — |
| 21 | Edward T. Laberdee | 32 | head | Salesman | Ohio |
| 22 | Adelaide E. Laberdee | 32 | wife | Receptionist | Ohio |
| 23 | Lawrence E. Carrico | 37 | head | Superintendent | Indiana |
| 24 | Marion J. Carrico | 34 | wife | — | New York |
| 25 | Lawrence E. Jr. Carrico | 3 | son | — | — |
| 26 | Ernest Miller | 38 | head | Engineer | Ohio |
| 27 | Ray O. Wadel | 41 | head | Mechanic | Ohio |
| 28 | Valmeta A. Wadel | 40 | wife | — | Michigan |
| 29 | Rose Farmer | 70 | mother | — | Michigan |
| 30 | William Shell | 66 | lodger | Night Watchman | Ohio |
| 31 | Thomas Weingart | 54 | head | Salesman | Switzerland |
| 32 | Effie S. Weingart | 50 | wife | — | Ohio |
| 33 | Joseph T. Weingart | 19 | son | — | Ohio |
| 34 | Mary H. Weingart | 16 | daughter | — | Ohio |
| 35 | Elmer F. Becker | 31 | head | Clerk | New York |
| 36 | Katherine V. Becker | 29 | wife | — | New Jersey |
| 37 | Dianne Becker | 2 | daughter | — | — |
| 38 | John H. Volker | 55 | head | Maintenance | Michigan |
| 39 | Fairy E. Volker | 48 | wife | — | Ohio |
| 40 | Charles M. Volker | 12 | son | — | Ohio |
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)