JK
John Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 6-person household.
Age 45
b. ~1895
Male
Head
Born: Montana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Butte |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Occupation | Miner |
| Industry | Mining Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 200 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Miner |
| Township / Ward | Butte |
| Est. Birth Year | ~1895 |
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 |
|---|---|---|---|---|
| Jack Knapp | Son | — | 7 | ~1933 |
| George Knapp | Son | — | 8 | ~1932 |
| Lorane Knapp | Daughter | — | 11 | ~1929 |
| Ray Knapp | Son | — | 2 | ~1938 |
| Hazel Knapp | Spouse | — | 34 | ~1906 |
| John Knapp | Head | — | 45 | ~1895 |
Census Appearances
1930
Silver Bow, …
Head, age 34
Silver Bow, Montana · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Montana |
| Age at First Marriage | 30 |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Nebraska |
| Occupation | Miner |
| Industry | Copper mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 18 |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Head, age 45
Silver-Bow-County, Montana · implied b. ~1895 — 6 household members
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Butte |
| 1935 Residence (County) | Silver Bow |
| Occupation | Miner |
| Industry | Mining Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 200 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 45 · b. ~1895 · Montana
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Silver-Bow-County, Montana
Open full size
1940 US Federal Census — Silver-Bow-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02231-00649)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellen Buchman | 55 | Wife | — | Sweden |
| 42 | John Spangler | 35 | Head | Teamster | Connecticut |
| 43 | Mary L. Spangler | 34 | Wife | — | Missouri |
| 44 | Nona Van Horn | 38 | Head | Cook | Washington |
| 45 | Joseph Van Horn | 19 | Son | — | Washington |
| 46 | Thomas Van Horn | 18 | Son | Waiter | Montana |
| 47 | Elizabeth Van Horn | 16 | Daughter | — | Montana |
| 48 | Michael Connell | 71 | Head | Janitor | Eire |
| 49 | Agnes Connell | 60 | Wife | — | Eire |
| 50 | Agnes Connell | 45 | Daughter | — | Montana |
| 51 | Edward Connell | 42 | Son | Laborer | Montana |
| 52 | Laverne Connell | 17 | Granddaughter | — | Montana |
| 53 | Victor Geary | 45 | Head | Plasterer | Washington |
| 54 | Ruth Geary | 46 | Wife | — | Minnesota |
| 55 | Richard Geary | 19 | Son | App. Plasterer | Washington |
| 56 | Donald Geary | 12 | Son | — | Montana |
| 57 | John Victor Geary | 9 | Son | — | Montana |
| 58 | Doris Mcquarish | 29 | Head | — | Montana |
| 59 | Eddie Mcquarish | 9 | Son | — | Montana |
| 60 | Patrick Mcquarish | 8 | Son | — | Montana |
| 61 | Jean Mcquarish | 6 | Daughter | — | Montana |
| 62 | Larry Mcquarish | 0 | Son | — | Montana |
| 63 | Amelia Bachman | 60 | Head | — | Austria |
| 64 | John Knapp THIS PERSON | 45 | Head | Miner | Montana |
| 65 | Hazel Knapp | 34 | Wife | — | Montana |
| 66 | Lorane Knapp | 11 | Daughter | — | Montana |
| 67 | George Knapp | 8 | Son | — | Montana |
| 68 | Jack Knapp | 7 | Son | — | Montana |
| 69 | Ray Knapp | 2 | Son | — | Montana |
| 70 | Edmond Herold | 30 | Head | Clerk | Montana |
| 71 | Marian Herold | 21 | Wife | — | Montana |
| 72 | James Herold | 2 | Son | — | Montana |
| 73 | Rudolph Gronvold | 29 | Head | Miner | Minnesota |
| 74 | Martha Gronvold | 29 | Wife | — | No. Dakota |
| 75 | Joan Gronvold | 3 | Daughter | — | Montana |
| 76 | Jan Gronvold | 1 | Daughter | — | Montana |
| 77 | Andrew M. Lind | 56 | Head | Miner | Montana |
| 78 | Mona M. Lind | 60 | Wife | — | Finland |
| 79 | Walter M. Lind | 29 | Son | Millman | Montana |
| 80 | Elmer E. Lind | 27 | Son | Miner | Montana |
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)