JK
John Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Benzie-County, Michigan
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Benzie-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Benzie-County, Michigan |
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Benzonia Twp |
| 1935 Residence (County) | Benzie |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Benzonia Twp |
| Est. Birth Year | ~1921 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Knapp | Son | — | 19 | ~1921 |
| Edwin Knapp | Son | — | 14 | ~1926 |
| Lloyd Knapp | Son | — | 5 | ~1935 |
| May Knapp | Spouse | — | 46 | ~1894 |
| William Knapp | Head | — | 60 | ~1880 |
| Dora Knapp | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Benzie, Michigan
Son, age 9
Benzie, Michigan · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Benzie-County, Michigan
Son, age 19
Benzie-County, Michigan · implied b. ~1921 — 6 household members
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Benzonia Twp |
| 1935 Residence (County) | Benzie |
| Highest Grade | Hs 1 |
| 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.
Show:
This person
Anchor record
John Knapp
Son · 1940 · age 19 · b. ~1921 · Michigan
★ You are viewing this record
Sibling
Edwin Knapp
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lloyd Knapp
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dora Knapp
Sibling · 1940 · age 17
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 — Benzie-County, Michigan
Open full size
1940 US Federal Census — Benzie-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01730-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Harris | 7 | Son | — | Michigan |
| 2 | Paul Harris | 5 | Son | — | Michigan |
| 3 | Shirley Harris | 2 | Daughter | — | Michigan |
| 4 | Arthur Wilson | 57 | Head | Farmer | Michigan |
| 5 | Cora Wilson | 62 | Wife | — | Illinois |
| 6 | John Hopkins | 39 | Head | Farmer | Michigan |
| 7 | Lillian Hopkins | 39 | Wife | — | Maryland |
| 8 | John Jr. Hopkins | 14 | Son | — | Michigan |
| 9 | Marianne Hopkins | 12 | Daughter | — | Michigan |
| 10 | Frederick Hopkins | 11 | Son | — | Michigan |
| 11 | Richard Hopkins | 9 | Son | — | Michigan |
| 12 | Robert Hopkins | 4 | Son | — | Michigan |
| 13 | Guy Snell | 41 | Head | Farmer | Michigan |
| 14 | Laura Snell | 40 | Wife | — | Michigan |
| 15 | Ardith Snell | 16 | Daughter | — | Michigan |
| 16 | Robert Snell | 13 | Son | — | Michigan |
| 17 | Winifred Snell | 9 | Daughter | — | Michigan |
| 18 | Fred Schmen | 71 | Father-in-law | — | Germany |
| 19 | Edward Brooks | 47 | Head | Fire Chief | Michigan |
| 20 | Bernice Brooks | 46 | Wife | — | Illinois |
| 21 | Edward Brooks | 19 | Son | — | Illinois |
| 22 | John Brooks | 15 | Son | — | Illinois |
| 23 | George H. Priest | 70 | Head | — | England |
| 24 | Mary Priest | 73 | Wife | — | Canada |
| 25 | James Harris | 42 | Head | Farmer | Michigan |
| 26 | Effie Harris | 36 | Wife | — | Michigan |
| 27 | Florence K. Harris | 17 | Daughter | — | Michigan |
| 28 | Bertha Harris | 15 | Daughter | — | Michigan |
| 29 | Frank Harris | 12 | Son | — | Michigan |
| 30 | Thelma Harris | 9 | Daughter | — | Michigan |
| 31 | Betty Harris | 5 | Daughter | — | Michigan |
| 32 | Mathew Harris | 1 | Son | — | Michigan |
| 33 | William Knapp | 60 | Head | Farm Hand | Michigan |
| 34 | May Knapp | 46 | Wife | — | Michigan |
| 35 | John Knapp THIS PERSON | 19 | Son | — | Michigan |
| 36 | Dora Bell Knapp | 17 | Daughter | — | Michigan |
| 37 | Edwin Knapp | 14 | Son | — | Michigan |
| 38 | Lloyd Knapp | 5 | Son | — | Michigan |
| 39 | Fred Neal | 68 | Head | — | England |
| 40 | Bert Arr | 54 | Head | Farmer | Michigan |
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)