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.~1922), then head of a 9-person household.
Age 18
b. ~1922
Female
Daughter
Born: Indiana
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 | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Lucas |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Occupation | Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 86 |
| Highest Grade | H 4 |
| 1935 Residence | Ohio |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Maid |
| Township / Ward | Adams |
| Est. Birth Year | ~1922 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Faye Walters | Daughter | — | 26 | ~1914 |
| Ada Farmer | Spouse | — | 50 | ~1890 |
| Paul Farmer | Son | — | 11 | ~1929 |
| Fred Farmer | Head | — | 55 | ~1885 |
| Albert Walters | Other | — | 28 | ~1912 |
| David Walters | Other | — | 4 | ~1936 |
| Alvin Farmer | Son | — | 21 | ~1919 |
| Mary Farmer | Daughter | — | 18 | ~1922 |
| Patricia Walters | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Lucas, Ohio
Daughter, age 8
Lucas, Ohio · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farmer |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lucas-County, Ohio
Daughter, age 18
Lucas-County, Ohio · implied b. ~1922 — 9 household members
| Surname | Farmer |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Lucas |
| 1935 Residence (County) | Lucas |
| Occupation | Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 86 |
| Highest Grade | H 4 |
| 1935 Residence | Ohio |
| 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 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 18 · b. ~1922 · Ohio
★ You are viewing this record
Sibling
Paul Farmer
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Walters
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alvin Farmer
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Faye Walters
Sibling · 1940 · age 26
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
38 people indexed on this census page (nara:1940:m-t0627-03105-00201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Mccord | 61 | Mother in law | — | Indiana |
| 42 | Fred Farmer | 55 | Head | Truck Contractor | Indiana |
| 43 | Ada Farmer | 50 | Wife | — | Indiana |
| 44 | Alvin Farmer | 21 | Son | — | Indiana |
| 45 | Mary Jane Farmer THIS PERSON | 18 | Daughter | Maid | Indiana |
| 46 | Paul Farmer | 11 | Son | — | Ohio |
| 47 | Albert Walters | 28 | Son in law | Welder | Indiana |
| 48 | Faye Walters | 26 | Daughter | — | Indiana |
| 49 | Patricia Walters | 8 | Daughter | — | Ohio |
| 50 | David Walters | 4 | Grandson | — | Ohio |
| 51 | Leonard Nowak | 42 | Head | Machinist Helper | Pennsylvania |
| 52 | Rose Nowak | 42 | Wife | — | Ohio |
| 53 | Marcianna Nowak | 12 | Daughter | — | Ohio |
| 55 | Peter Colvin | 78 | Head | — | Canada-English |
| 56 | Stella Anspach | 60 | Head | — | Ohio |
| 57 | Floyd Kurdys | 39 | Head | Car Repairman | Ohio |
| 58 | Mary Kurdys | 36 | Wife | — | Ohio |
| 59 | Richard Kurdys | 15 | Son | — | Ohio |
| 60 | Henry Meyer | 62 | Head | Farmer | Ohio |
| 61 | Rose Meyer | 59 | Wife | — | Ohio |
| 62 | Norbert Meyer | 28 | Son | Farm Hand | Ohio |
| 63 | Harold Meyer | 25 | Son | Farm Hand | Ohio |
| 64 | Walter Meyer | 21 | Son | Farm Hand | Ohio |
| 65 | Louis Grabarkiewicz | 25 | Head | Musician | Ohio |
| 66 | Florence Grabarkiewicz | 22 | Wife | — | Ohio |
| 67 | Barbara Grabarkiewicz | 3 | Daughter | — | Ohio |
| 68 | Carol Grabarkiewicz | 1 | Daughter | — | Ohio |
| 69 | Lottie Mallo | 51 | Head | Saleswoman | Poland |
| 70 | Betty Mallo | 12 | Daughter | — | Ohio |
| 71 | Chester Sniegowski | 30 | Head | Shipping Clerk | Ohio |
| 72 | Josephine Sniegowski | 29 | Wife | — | Ohio |
| 73 | Donald Sniegowski | 5 | Son | — | Ohio |
| 74 | Loretta Sniegowski | 1 | Daughter | — | Ohio |
| 75 | Norbert F. Swartz | 34 | Head | Trimmer | Ohio |
| 76 | Margaret Swartz | 29 | Wife | — | Ohio |
| 77 | Carol Swartz | 2 | Daughter | — | Ohio |
| 78 | Peter Swartz | 65 | Head | Farmer | Ohio |
| 79 | Minnie Swartz | 62 | Wife | — | 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)