JK
John Kuhn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Kuhn across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Kuhn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Machinist |
| Industry | Machine Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 326 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Machinist |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1915 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Joseph Kuhn | Head | — | 52 | ~1888 |
| Joseph Kuhn | Son | — | 28 | ~1912 |
| James Kuhn | Son | — | 14 | ~1926 |
| Blanche Doyle | Other | — | 48 | ~1892 |
| Mary Kuhn | Spouse | — | 51 | ~1889 |
| Catherine Doyle | Other | — | 46 | ~1894 |
| Mary Kuhn | Daughter | — | 21 | ~1919 |
| Kathleen Kuhn | Daughter | — | 23 | ~1917 |
| John Kuhn | Son | — | 25 | ~1915 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 15
Allegheny, Pennsylvania · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kuhn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 9 household members
| Surname | Kuhn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Machinist |
| Industry | Machine Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 326 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Kuhn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kuhn
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
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Sibling
Mary Kuhn
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Kuhn
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Kuhn
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kuhn
Sibling · 1940 · age 28
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
33 people indexed on this census page (nara:1940:m-t0627-03661-00462)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | H. Olive Ashman | 70 | Lodger | Practical Nurse | Ohio |
| 3 | Joseph A. Kuhn | 52 | Head | Jeweler | Pennsylvania |
| 4 | Mary Kuhn | 51 | Wife | — | Eire |
| 5 | Joseph Kuhn | 28 | Son | Timekeeper | Pennsylvania |
| 6 | John Kuhn THIS PERSON | 25 | Son | Machinist | Pennsylvania |
| 7 | Kathleen Kuhn | 23 | Daughter | Stenographer | Pennsylvania |
| 8 | Mary Alice Kuhn | 21 | Daughter | Stenographer | Pennsylvania |
| 9 | James F. Kuhn | 14 | Son | — | Pennsylvania |
| 10 | Blanche Doyle | 48 | Sister-in-law | Salesgirl | Eire |
| 11 | Catherine Doyle | 46 | Sister-in-law | Salesgirl | Eire |
| 12 | John J. Hazlewood | 56 | Head | Engineer | Pennsylvania |
| 13 | Muriel Hazlewood | 50 | Wife | — | Indiana |
| 14 | Leonard Youngs | 26 | Head | Excavator | Pennsylvania |
| 15 | Oreole Youngs | 25 | Wife | Secretary | Argentina |
| 16 | Catherine Youngs | 3 | Daughter | — | Pennsylvania |
| 17 | Joseph Youngs | 1 | Son | — | Pennsylvania |
| 18 | James Charles | 44 | Head | Pipe Fitter | Pennsylvania |
| 20 | Harriett Charles | 43 | Wife | — | Pennsylvania |
| 21 | Virginia Charles | 21 | Daughter | New Worker | Pennsylvania |
| 22 | Mildred Charles | 18 | Daughter | New Worker | Pennsylvania |
| 23 | James Charles | 17 | Son | — | Pennsylvania |
| 24 | Richard Charles | 14 | Son | — | Pennsylvania |
| 25 | John Charles | 13 | Son | — | Pennsylvania |
| 26 | Robert Charles | 11 | Son | — | Pennsylvania |
| 27 | Clare Charles | 12 | Daughter | — | Pennsylvania |
| 28 | Patricia Charles | 9 | Daughter | — | Pennsylvania |
| 29 | David Blackhall | 51 | Head | Roofer | Scotland |
| 30 | Catherine Blackhall | 51 | Wife | Secretary | Ireland |
| 31 | John Moore | 10 | Grandson | — | Pennsylvania |
| 32 | Frank Moore | 9 | Grandson | — | Pennsylvania |
| 33 | Kenneth E. Hummell | 35 | Head | Order Clerk | Pennsylvania |
| 34 | Jean E. Hummell | 32 | Wife | — | Pennsylvania |
| 35 | Cornelius J. Ross | 30 | Lodger | Butler | Alabama |
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)