JK
John Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Stearns-County, Minnesota
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Stearns-County, Minnesota (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 8-person household.
Age 24
b. ~1916
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Stearns-County, Minnesota |
| Surname | Knapp |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Albany Twp |
| 1935 Residence (County) | Stearns |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Albany Twp |
| Est. Birth Year | ~1916 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Maryann Knapp | Daughter | — | 20 | ~1920 |
| John Knapp | Son | — | 24 | ~1916 |
| Peter Knapp | Head | — | 57 | ~1883 |
| Ester Knapp | Daughter | — | 10 | ~1930 |
| Lillian Knapp | Son | — | 13 | ~1927 |
| Dorothy Knapp | Daughter | — | 16 | ~1924 |
| Sylvester Knapp | Son | — | 7 | ~1933 |
| Amalia Knapp | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Stearns, Minnesota
Other, age 12
Stearns, Minnesota · implied b. ~1918 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | Joan |
| Relationship to Head | Orphan |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Stearns-County, Minnesota
Son, age 24
Stearns-County, Minnesota · implied b. ~1916 — 8 household members
| Surname | Knapp |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Albany Twp |
| 1935 Residence (County) | Stearns |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 24 · b. ~1916 · Minnesota
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Sibling
Dorothy Knapp
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ester Knapp
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maryann Knapp
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Knapp
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvester Knapp
Sibling · 1940 · age 7
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 — Stearns-County, Minnesota
Open full size
1940 US Federal Census — Stearns-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01960-00040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Hoppe | 9 | Son | — | Minnesota |
| 2 | Aloys Hoppe | 7 | Son | — | Minnesota |
| 3 | Colin Hoppe | 5 | Son | — | Minnesota |
| 4 | Elizabeth Hoppe | 3 | Daughter | — | Minnesota |
| 5 | Louise J. Hoppe | 0 | Daughter | — | Minnesota |
| 6 | Theresia Haselkamp | 83 | Mother in law | — | Germany |
| 7 | Ben Haselkamp | 60 | Brother in law | Retired | Germany |
| 8 | Edward Enteneuer | 22 | Employee | Laborer | Minnesota |
| 9 | Veronica Enteneuer | 35 | Maid | House Work | Minnesota |
| 10 | Theodore Dillenburg | 70 | Boarder | Handy Man | Germany |
| 11 | Joseph D. Ellinger | 45 | Head | Farmer | Minnesota |
| 12 | Margaret Ellinger | 37 | Wife | — | Minnesota |
| 13 | Margaret Ellinger | 74 | Mother | — | Luxemburg |
| 14 | Christ Keiser | 70 | Head | Farmer | Minnesota |
| 15 | John Keiser | 73 | Brother | Employee | Minnesota |
| 16 | Amelia Keiser | 63 | Sister | House Work | Minnesota |
| 17 | Minnie Keiser | 62 | Sister | House Work | Minnesota |
| 18 | Holda Keiser | 60 | Sister | House Work | Minnesota |
| 19 | Elizabeth Richter | 69 | Head | House Work | Minnesota |
| 20 | Roland Richter | 33 | Son | — | Minnesota |
| 21 | Theodore Lundl | 35 | Employee | Farmer | Minnesota |
| 22 | Anna Lundl | 33 | Wife | — | Minnesota |
| 23 | Eddy Lundl | 7 | Son | — | Minnesota |
| 24 | Marvin Lundl | 2 | Son | — | Minnesota |
| 25 | Alois D. Kippers | 32 | Head | Road Work | Minnesota |
| 26 | Margaret L. Kippers | 31 | Wife | — | Wisconsin |
| 27 | Alois J. Kippers | 11 | Son | — | Minnesota |
| 28 | Rose Marie Kippers | 9 | Daughter | — | Minnesota |
| 29 | Eugene Kippers | 6 | Son | — | Minnesota |
| 30 | Herbert Kippers | 4 | Son | — | Minnesota |
| 31 | Melvin Kippers | 1 | Son | — | Minnesota |
| 32 | Peter G. Knapp | 57 | Head | Farmer | Minnesota |
| 33 | Amalia Knapp | 47 | Wife | House Work | Minnesota |
| 34 | John M. Knapp THIS PERSON | 24 | Son | — | Minnesota |
| 35 | Maryann Knapp | 20 | Daughter | — | Minnesota |
| 36 | Dorothy Knapp | 16 | Daughter | — | Minnesota |
| 37 | Lillian Knapp | 13 | Son | — | Minnesota |
| 38 | Ester Knapp | 10 | Daughter | — | Minnesota |
| 39 | Sylvester Knapp | 7 | Son | — | Minnesota |
| 40 | Henry A. Bloch | 40 | Head | Farmer | Minnesota |
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)