JH
John Hahn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ozaukee-County, Wisconsin
Our Model Tree links this John Hahn across the 1930 and 1940 US Censuses in Ozaukee-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 4-person household.
Age 58
b. ~1882
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ozaukee-County, Wisconsin |
| Surname | Hahn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Grafton |
| 1935 Residence (County) | Ozaukee |
| Additional Details | |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farming |
| Township / Ward | Grafton |
| Est. Birth Year | ~1882 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Hahn | Head | — | 58 | ~1882 |
| Clarence Hahn | Son | — | 23 | ~1917 |
| Catherine Hahn | Daughter | — | 21 | ~1919 |
| Catherine Hahn | Spouse | — | 56 | ~1884 |
Census Appearances
1930
Ozaukee, Wisconsin
Head, age 48
Ozaukee, Wisconsin · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hahn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 24 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Ozaukee-County, Wisconsin
Head, age 58
Ozaukee-County, Wisconsin · implied b. ~1882 — 4 household members
| Surname | Hahn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Grafton |
| 1935 Residence (County) | Ozaukee |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Hahn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hahn
Head · 1940 · age 58 · b. ~1882 · Wisconsin
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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 — Ozaukee-County, Wisconsin
Open full size
1940 US Federal Census — Ozaukee-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04510-00221)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Doris Wendtlandt | 11 | Daughter | — | Wisconsin |
| 42 | James Wendtlandt | 10 | Son | — | Wisconsin |
| 43 | Charles J. Kurtz | 56 | Head | Farming | Wisconsin |
| 44 | Ella Kurtz | 54 | Wife | Housewife | Wisconsin |
| 45 | Irving Kurtz | 22 | Son | Hired Man | Wisconsin |
| 46 | Elda Kurtz | 18 | Daughter | House Work | Wisconsin |
| 47 | Fred J. Dries | 70 | Head | Farming | Wisconsin |
| 48 | John P. Dries | 38 | Son | Farm Hand | Wisconsin |
| 49 | Irma Dries | 26 | Daughter-in-law | Housewife | Wisconsin |
| 50 | Nancy Dries | 4 | Granddaughter | — | Wisconsin |
| 51 | Barbara Dries | 2 | Granddaughter | — | Wisconsin |
| 52 | Irene Dries | 0 | Granddaughter | — | Wisconsin |
| 53 | Charles K. Denow | 27 | Head | Farming | Wisconsin |
| 54 | Ethel H. Denow | 21 | Wife | Housewife | Wisconsin |
| 55 | Extra Line Denow | None | — | — | — |
| 56 | Peter J. Thelen | 49 | Head | Farming | Wisconsin |
| 57 | Catherine Thelen | 50 | Wife | Housewife | Wisconsin |
| 58 | Ralph Thelen | 22 | Son | Drillpress | Wisconsin |
| 59 | Marguerite Thelen | 18 | Daughter | Farm Home | Wisconsin |
| 60 | Loraine Thelen | 13 | Daughter | — | Wisconsin |
| 61 | Marcella Thelen | 11 | Daughter | — | Wisconsin |
| 62 | Robert J. Ferber | 34 | Head | Salesman | Wisconsin |
| 63 | Hattie D. Ferber | 34 | Wife | Housewife | Wisconsin |
| 64 | Thomas R. Ferber | 4 | Son | — | Wisconsin |
| 65 | Judith Ferber | 1 | Daughter | — | Wisconsin |
| 66 | Edward W. Ott | 54 | Head | Molder | Wisconsin |
| 67 | Martha Ott | 60 | Wife | Housewife | Germany |
| 68 | Clarence Ott | 30 | Son | Farming | Wisconsin |
| 69 | Edward Jr. Ott | 22 | Son | Farming | Wisconsin |
| 70 | Andrew Schreiner | 55 | Head | Farming | Wisconsin |
| 71 | Minnie Schreiner | 45 | Wife | Housewife | Wisconsin |
| 72 | Caroline Schreiner | 16 | Daughter | — | Wisconsin |
| 73 | Victor Schreiner | 12 | Son | — | Wisconsin |
| 74 | Elroy Schreiner | 10 | Son | — | Wisconsin |
| 75 | Adolph Witte | 22 | Hired Man | Farm Hand | Wisconsin |
| 76 | Arnold Witte | 18 | Hired Man | Farm Hand | Wisconsin |
| 77 | John Hahn THIS PERSON | 58 | Head | Farming | Wisconsin |
| 78 | Catherine Hahn | 56 | Wife | Housewife | Wisconsin |
| 79 | Clarence Hahn | 23 | Son | Assembler | Wisconsin |
| 80 | Catherine Hahn | 21 | Daughter | House Work | Wisconsin |
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)