JK
John Knapp — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Wayne, Michigan
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Wayne, Michigan (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 10-person household.
Age 40
b. ~1890
Male
Head
Born: Michigan
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Wayne, Michigan |
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 24 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Additional Details | |
| Occupation | Assembling |
| Industry | Automobile Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Veteran | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Assembling |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1890 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ethel Knapp | Other | — | 42 | ~1888 |
| Charles Knapp | Son | — | 6 | ~1924 |
| Joseph Knapp | Other | — | 20 | ~1910 |
| John Knapp | Head | — | 40 | ~1890 |
| Robert Knapp | Son | — | 15 | ~1915 |
| John Mccombie | Other | — | 34 | ~1896 |
| Edith Knapp | Daughter | — | 11 | ~1919 |
| Daniel Mccombie | Other | — | 79 | ~1851 |
| Paul Fields | Other | — | 22 | ~1908 |
| Jane Knapp | Daughter | — | 13 | ~1917 |
Census Appearances
1930
Wayne, Michigan
Head, age 40
Wayne, Michigan · implied b. ~1890 — 10 household members
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 24 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | Assembling |
| Industry | Automobile Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Veteran | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Head, age 50
Wayne-County, Michigan · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knepp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Occupation | Laborer |
| Industry | Auto Manufacturer |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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.
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This person
Anchor record
John Knapp
Head · 1930 · age 40 · b. ~1890 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Wayne, Michigan
Open full size
1930 US Federal Census — Wayne, Michigan
Page Contents
50 people indexed on this census page (ia:1930:michigancensus00reel1051:1023)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julius Kay | 26 | Head | Proprietor | Hungary |
| 2 | Mary Kay | 16 | Wife-H | — | Croatia |
| 3 | Mary Kay | 0 | Daughter | — | Michigan |
| 4 | Elizabeth Toth | 38 | Mother-in-law | — | Hungary-Croatia |
| 5 | James Malancic | 27 | Head | Assembling | Yugoslavia |
| 6 | Julia Malancic | 23 | Wife-H | Machine Hand | Yugoslavia |
| 7 | Andy Malancic | 59 | Father | Laborer | Hungary-Croatia |
| 8 | John Knapp THIS PERSON | 40 | Head | Assembling | Michigan |
| 9 | Ethel Knapp | 42 | Wife-H | — | Nova Scotia |
| 10 | Robert A. Knapp | 15 | Son | — | Wisconsin |
| 11 | Jane Knapp | 13 | Daughter | — | Wisconsin |
| 12 | Edith Knapp | 11 | Daughter | — | Michigan |
| 13 | Charles Knapp | 6 | Son | — | Michigan |
| 14 | Daniel T. Mccombie | 79 | Father-in-law | Carpenter | Nova Scotia |
| 15 | John Mccombie | 34 | Boarder | Machinist | Michigan |
| 16 | Paul Fields | 22 | Boarder | Machine Oper. | Alabama |
| 17 | Joseph Knapp | 20 | Nephew | Address Helper | Minnesota |
| 18 | Fred Beboe | 41 | Head | Manager | Massachusetts |
| 19 | Ida Beboe | 39 | Wife-H | — | Michigan |
| 20 | Charles Lamoreaux | 30 | Roomer | Laborer | New York |
| 21 | Matt Klotshuber | 41 | Roomer | Die Maker | Germany |
| 22 | Emily Alliston | 46 | Head-H | — | England |
| 23 | Fred Alliston | 23 | Son | Auditor | Canada-English |
| 24 | Arthur Alliston | 19 | Son | Stenographer | Canada-English |
| 25 | Jessie Alliston | 16 | Daughter | — | Canada-English |
| 26 | Tony Marzella | 36 | Head | Laborer | Italy |
| 27 | Olivia Marzella | 34 | Wife-H | — | Italy |
| 28 | Virginia Marzella | 5 | Daughter | — | Michigan |
| 29 | Guerino Marzella | 4 | Son | — | Michigan |
| 30 | Philamine Marzella | 1 | Daughter | — | Michigan |
| 31 | Joe Mancini | 28 | Boarder | Machine Oper. | Italy |
| 32 | Dominic Marino | 40 | Boarder | Cement Finisher | Italy |
| 33 | James Eachren | 50 | Head | Laborer | Canada-English |
| 34 | Florence Eachren | 41 | Wife-H | — | Illinois |
| 35 | William Eachren | 22 | Son | Deliveryman | Michigan |
| 36 | George Eachren | 19 | Son | Houseboy | Michigan |
| 37 | Robert Eachren | 16 | Son | Houseboy | Michigan |
| 38 | Adelbert Eachren | 13 | Son | — | Michigan |
| 39 | Eunice Eachren | 8 | Daughter | — | Michigan |
| 40 | Eva Eachren | 7 | Daughter | — | Michigan |
| 41 | Ruth Eachren | 1 | Daughter | — | Michigan |
| 42 | Aldrich-Arthur Eachren | 20 | Boarder | Houseboy | Michigan |
| 43 | William Ninsman | 32 | Head | Laborer | Canada-English |
| 44 | Lucy Ninsman | 29 | Wife-H | — | England |
| 45 | Joseph Ninsman | 7 | Son | — | Canada-English |
| 46 | George Ninsman | 4 | Son | — | Michigan |
| 47 | Lillian Ninsman | 2 | Daughter | — | Michigan |
| 48 | Lorna Ninsman | 0 | Daughter | — | Michigan |
| 49 | George Walford | 25 | Head | Upholsterer | England |
| 50 | Helen Walford | 19 | Wife-H | — | Michigan |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)