JK
John Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 7-person household.
Age 48
b. ~1892
Male
Head
Born: Poland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Detroit |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 68 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Occupation | Carpenter |
| Township / Ward | Detroit |
| Est. Birth Year | ~1892 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helene Stachura | Daughter | — | 25 | ~1915 |
| Lillian Knapp | Daughter | — | 13 | ~1927 |
| Angeline Knapp | Spouse | — | 46 | ~1894 |
| Richard Knapp | Son | — | 9 | ~1931 |
| Raymond Stachura | Other | — | 25 | ~1915 |
| John Knapp | Head | — | 48 | ~1892 |
| Joseph Knapp | Son | — | 21 | ~1919 |
Census Appearances
1930
Wayne, Michigan
Head, age 37
Wayne, Michigan · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Poland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1907 |
| Age at First Marriage | 20 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Lumber yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Wayne-County, Michigan
Head, age 48
Wayne-County, Michigan · implied b. ~1892 — 7 household members
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Detroit |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Occupation | Carpenter |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 68 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 Knapp across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Knapp
Head · 1940 · age 48 · b. ~1892 · Michigan
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01867-00819)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Salovich | 15 | son | — | Michigan |
| 2 | Leroy Salovich | 12 | son | — | Michigan |
| 3 | Anna Tellep | 62 | mother-in-law | — | Austria |
| 4 | Mildred Frederick | 31 | sister-in-law | — | Pennsylvania |
| 5 | Frank Moranty | 36 | head | Fireman | Michigan |
| 6 | Lottie Moranty | 36 | wife | — | Michigan |
| 7 | David Moranty | 7 | son | — | Michigan |
| 8 | Phillip Moranty | 5 | son | — | Michigan |
| 9 | John Knapp THIS PERSON | 48 | head | Carpenter | Poland |
| 10 | Angeline Knapp | 46 | wife | — | Poland |
| 11 | Joseph Knapp | 21 | son | Auto Mechanic | Michigan |
| 12 | Lillian Knapp | 13 | daughter | — | Michigan |
| 13 | Richard Knapp | 9 | son | — | Michigan |
| 14 | Raymond Stachura | 25 | son-in-law | Clerk | Michigan |
| 15 | Helene Stachura | 25 | daughter | Stenographer | Illinois |
| 16 | George Woodmaney | 51 | head | — | Ohio |
| 17 | Mollie Woodmaney | 50 | wife | — | Michigan |
| 18 | William Woodmaney | 23 | son | Stock Clerk | Michigan |
| 19 | Dorothy Woodmaney | 19 | daughter-in-law | — | Michigan |
| 20 | William Jr Woodmaney | 2 | grandchild | — | Michigan |
| 21 | Albert Kuehl | 55 | head | Barber | Michigan |
| 22 | Marie Kuehl | 52 | wife | — | Michigan |
| 23 | Michal Borowiec | 43 | head | Broker | Poland |
| 24 | Mary Borowiec | 45 | wife | — | Michigan |
| 25 | Steve Malzay | 27 | head | Assembly Line | Pennsylvania |
| 26 | Mary Malzay | 23 | wife | Polisher | Pennsylvania |
| 27 | Valentine Smutek | 41 | head | Welder | New York |
| 28 | Sophie Smutek | 36 | wife | — | Poland |
| 29 | Virginia Smutek | 16 | daughter | — | Michigan |
| 30 | Ernest Smutek | 12 | son | — | Michigan |
| 31 | Raymond Smutek | 3 | son | — | Michigan |
| 32 | Frank Wozolek | 53 | head | — | Poland |
| 33 | Caroline Wozolek | 55 | wife | — | Poland |
| 34 | Walter Wozolek | 23 | son | Truck Loader | Michigan |
| 35 | Andrew Winiarski | 32 | son-in-law | Checker Of Produce | Michigan |
| 36 | Josephine Winiarski | 25 | daughter | — | Michigan |
| 37 | Donald Winiarski | 7 | grandchild | — | Michigan |
| 38 | Rudolph Kopacz | 37 | head | Baker | Poland |
| 39 | Helen Kopacz | 31 | wife | — | Michigan |
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)