JL
John Linn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, Ohio
Our Model Tree links this John Linn across the 1930 and 1940 US Censuses in Mercer-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 8-person household.
Age 60
b. ~1880
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, Ohio |
| Surname | Linn |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Washington Twp. |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Washington Twp |
| Est. Birth Year | ~1880 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Marie Linn | Spouse | — | 49 | ~1891 |
| Harry Linn | Son | — | 14 | ~1926 |
| Harold Linn | Son | — | 14 | ~1926 |
| Betty Linn | Daughter | — | 12 | ~1928 |
| John Linn | Head | — | 60 | ~1880 |
| John Linn | Son | — | 18 | ~1922 |
| Leon Linn | Son | — | 23 | ~1917 |
| Delphia Linn | Son | — | 21 | ~1919 |
Census Appearances
1930
Mercer, Ohio
Head, age 50
Mercer, Ohio · implied b. ~1880 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Linn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 28 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Mercer-County, Ohio
Head, age 60
Mercer-County, Ohio · implied b. ~1880 — 8 household members
| Surname | Linn |
| Given Name | John O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Washington Twp. |
| 1935 Residence (County) | Mercer |
| Income (1939) | 0 |
| Highest Grade | No 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 John Linn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Linn
Head · 1940 · age 60 · b. ~1880 · 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 — Mercer-County, Ohio
Open full size
1940 US Federal Census — Mercer-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03114-00744)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | S. R. Heitkamp | 53 | Head | — | Ohio |
| 2 | Blanche Heitkamp | 45 | Wife | — | Ohio |
| 3 | Mary E. Heitkamp | 24 | Daughter | Clerk | Ohio |
| 4 | Robert R. Heitkamp | 16 | Son | — | Ohio |
| 5 | John O. Linn THIS PERSON | 60 | Head | — | Ohio |
| 6 | Marie Linn | 49 | Wife | — | Ohio |
| 7 | Leon Linn | 23 | Son | Farmer | Ohio |
| 8 | Delphia Linn | 21 | Son | Farmer | Ohio |
| 9 | John Linn | 18 | Son | Farmer | Ohio |
| 10 | Harry Linn | 14 | Son | — | Ohio |
| 11 | Harold Linn | 14 | Son | — | Ohio |
| 12 | Betty Jean Linn | 12 | Daughter | — | Ohio |
| 13 | Edward Heitkamp | 31 | Head | Farmer | Ohio |
| 14 | Hilda Heitkamp | 30 | Wife | — | Ohio |
| 15 | Dorothy Heitkamp | 7 | Daughter | — | Ohio |
| 16 | Eileen Heitkamp | 5 | Daughter | — | Ohio |
| 17 | Paul Heitkamp | 4 | Son | — | Ohio |
| 18 | Wilford Heitkamp | 2 | Son | — | Ohio |
| 19 | Duthier O. Rene | 40 | Head | Gas Station | France |
| 20 | Beeta Rene | 39 | Wife | — | Michigan |
| 21 | Vivete Rene | 5 | Daughter | — | Michigan |
| 22 | Joseph Rene | 4 | Son | — | Indiana |
| 23 | Dwight Rene | 2 | Son | — | Indiana |
| 24 | Raymond Rene | 0 | Son | — | Ohio |
| 25 | Ray Vondel | 29 | Head | Farming | Ohio |
| 26 | Cecilia Vondel | 25 | Wife | — | Ohio |
| 27 | Joann Vondel | 2 | Daughter | — | Ohio |
| 28 | Christian Vroman | 50 | Head | Farmer | Ohio |
| 29 | Elizabeth Vroman | 43 | Wife | Farmer | Ohio |
| 30 | Madonna Vroman | 25 | Daughter | — | Ohio |
| 31 | Luella Vroman | 20 | Daughter | Bookkeeper | Ohio |
| 32 | Walter Vroman | 19 | Son | Farmer | Ohio |
| 33 | Bernadine Vroman | 17 | Daughter | — | Ohio |
| 34 | Wilfred Vroman | 16 | Son | — | Ohio |
| 35 | Doris Vroman | 13 | Niece | — | Indiana |
| 36 | Frederick Vroman | 7 | Nephew | — | Indiana |
| 37 | Anna Siegrist | 63 | Head | — | Ohio |
| 38 | Jacob Siegrist | 37 | Son | Farmer | Ohio |
| 39 | Edward Siegrist | 35 | Son | Farmer | Ohio |
| 40 | Monica Siegrist | 31 | 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)