MJ
Mary John — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wood-County, Ohio
Our Model Tree links this Mary John across the 1930 and 1940 US Censuses in Wood-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wood-County, Ohio |
| Surname | John |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Milton Twp |
| 1935 Residence (County) | Wood |
| Additional Details | |
| Highest Grade | No 11 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Milton Twp |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marian John | Daughter | — | 18 | ~1922 |
| Gilbert John | Head | — | 45 | ~1895 |
| Ruby John | Daughter | — | 13 | ~1927 |
| Jennie John | Spouse | — | 46 | ~1894 |
| Mary John | Daughter | — | 18 | ~1922 |
| Leonard John | Son | — | 20 | ~1920 |
| Ruth John | Daughter | — | 15 | ~1925 |
| Rosalie John | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Wood, Ohio
Daughter, age 5
Wood, Ohio · implied b. ~1925 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Wood-County, Ohio
Daughter, age 18
Wood-County, Ohio · implied b. ~1922 — 8 household members
| Surname | John |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Milton Twp |
| 1935 Residence (County) | Wood |
| Highest Grade | No 11 |
| 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 John across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary John
Daughter · 1940 · age 18 · b. ~1922 · Ohio
★ You are viewing this record
Sibling
Rosalie John
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian John
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard John
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby John
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth John
Sibling · 1940 · age 15
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 — Wood-County, Ohio
Open full size
1940 US Federal Census — Wood-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03171-00094)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Slater | 32 | Wife | Housewife | Ohio |
| 2 | Jean Slater | 13 | Daughter | — | Ohio |
| 3 | John Slater | 11 | Son | — | Ohio |
| 4 | James Slater | 7 | Son | — | Ohio |
| 5 | David Slater | 87 | Father | — | Ohio |
| 6 | Reed Groff | 44 | Head | Farmer | Ohio |
| 7 | Mamie Groff | 40 | Wife | — | Ohio |
| 8 | Albert Jones | 59 | Head | Oil Pumper | New York |
| 9 | Mary Jones | 57 | Wife | — | Ohio |
| 10 | Clayton Jones | 20 | Son | Labor | Ohio |
| 11 | Bob Jones | 18 | Son | — | Ohio |
| 12 | Monetta Jones | 15 | Daughter | — | Ohio |
| 13 | Lloyd Fretter | 32 | Head | Bus Driver | Ohio |
| 14 | Leota Fretter | 29 | Wife | — | Ohio |
| 15 | Leonard Fretter | 9 | Son | — | Ohio |
| 16 | Carol Ann Fretter | 4 | Daughter | — | Ohio |
| 17 | Flora Wilhelm | 70 | Head | — | Ohio |
| 18 | Isabel Wilhelm | 39 | Daughter | — | Ohio |
| 19 | Andrew Maas | 30 | Head | Farmer | Ohio |
| 20 | Ethel Maas | 28 | Wife | — | Ohio |
| 21 | James Maas | 1 | Son | — | Ohio |
| 22 | Will Herringshaw | 43 | Head | Farmer | Ohio |
| 23 | Ethel Herringshaw | 34 | Wife | — | Ohio |
| 24 | Fred Herringshaw | 18 | Son | Labor | Ohio |
| 25 | Chester Herringshaw | 16 | Son | Labor | Ohio |
| 26 | Edward Herringshaw | 14 | Son | — | Ohio |
| 27 | Virginia Herringshaw | 13 | Daughter | — | Ohio |
| 28 | Illa Herringshaw | 12 | Daughter | — | Ohio |
| 29 | Kenneth Herringshaw | 9 | Son | — | Ohio |
| 30 | Merl Herringshaw | 7 | Son | — | Ohio |
| 31 | Melvin Herringshaw | 5 | Son | — | Ohio |
| 32 | Shirley Herringshaw | 3 | Daughter | — | Ohio |
| 33 | Gilbert John | 45 | Head | Farmer | Ohio |
| 34 | Jennie John | 46 | Wife | — | Ohio |
| 35 | Leonard John | 20 | Son | — | Ohio |
| 36 | Mary John THIS PERSON | 18 | Daughter | — | Ohio |
| 37 | Marian John | 18 | Daughter | — | Ohio |
| 38 | Ruth John | 15 | Daughter | — | Ohio |
| 39 | Ruby John | 13 | Daughter | — | Ohio |
| 40 | Rosalie John | 11 | Daughter | — | 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)