JK
John Knapp — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Somerset-County, Pennsylvania
Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Somerset-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Somerset-County, Pennsylvania |
| Surname | Knapp |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Paint Bor. |
| 1935 Residence (County) | Somerset |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal industry |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 900 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Miner |
| Township / Ward | Paint Bor |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Nicki Knapp | Son | — | 13 | ~1927 |
| George Knapp | Son | — | 15 | ~1925 |
| Mary Knapp | Daughter | — | 17 | ~1923 |
| John Knapp | Son | — | 24 | ~1916 |
| John Knapp | Head | — | 44 | ~1896 |
| Ann Knapp | Daughter | — | 6 | ~1934 |
| Mary Knapp | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Somerset, Pennsylvania
Son, age 14
Somerset, Pennsylvania · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knapp |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Czechoslovakia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Somerset-County, Pennsylvania
Son, age 24
Somerset-County, Pennsylvania · implied b. ~1916 — 7 household members
| Surname | Knapp |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Paint Bor. |
| 1935 Residence (County) | Somerset |
| Occupation | Miner |
| Industry | Coal industry |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 900 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 · Pennsylvania
★ You are viewing this record
Sibling
George Knapp
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nicki Knapp
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Knapp
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Knapp
Sibling · 1940 · age 6
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 — Somerset-County, Pennsylvania
Open full size
1940 US Federal Census — Somerset-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03610-00483)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Peggy Kotyun | 5 | Daughter | — | Pennsylvania |
| 42 | John Kotyun | 51 | Head | Coal Miner | Hungary |
| 43 | Mary Kotyun | 44 | Wife | — | Hungary |
| 44 | Paul Jr. Kotyun | 27 | Son | Miner | Pennsylvania |
| 45 | Annie Kotyun | 17 | Daughter | — | Pennsylvania |
| 46 | Joe Kotyun | 13 | Son | — | Pennsylvania |
| 47 | Michael Kotyun | 11 | Son | — | Pennsylvania |
| 48 | Pauline Kotyun | 8 | Daughter | — | Pennsylvania |
| 49 | John Kotyun | 29 | Son | Miner | Pennsylvania |
| 50 | Mary Kotyun | 21 | Daughter-in-law | — | Pennsylvania |
| 51 | Tony Meko | 66 | Head | — | Poland |
| 52 | Sophie Meko | 61 | Wife | — | Poland |
| 53 | Josephine Skawronski | 52 | Head | — | Poland |
| 54 | Walter Skawronski | 27 | Son | Miner | Pennsylvania |
| 55 | Stanley Skawronski | 24 | Son | Miner | Pennsylvania |
| 56 | Michael Skawronski | 23 | Son | Miner | Pennsylvania |
| 57 | "Rose ""Al""" Skawronski | 20 | Daughter | — | Pennsylvania |
| 58 | Genevieve Skawronski | 18 | Daughter | Maid | Pennsylvania |
| 59 | Marion Skawronski | 11 | Daughter | — | Pennsylvania |
| 60 | Anthony Pester | 62 | Boarder | — | Poland |
| 61 | John Kozma | 36 | Head | Miner | Austria |
| 62 | Helen Kozma | 26 | Wife | — | Austria |
| 63 | John Knapp | 44 | Head | Miner | Czechoslovakia |
| 64 | Mary Knapp | 44 | Wife | — | Pennsylvania |
| 65 | John Jr. Knapp THIS PERSON | 24 | Son | Miner | Pennsylvania |
| 66 | Mary Knapp | 17 | Daughter | — | Pennsylvania |
| 67 | George Knapp | 15 | Son | — | Pennsylvania |
| 68 | Nicki Knapp | 13 | Son | — | Pennsylvania |
| 69 | Ann Knapp | 6 | Daughter | — | Pennsylvania |
| 70 | Eva Mellock | 58 | Head | — | Poland |
| 71 | Joseph Mellock | 24 | Son | Miner | Pennsylvania |
| 72 | Stella Mellock | 22 | Daughter | New Worker | Pennsylvania |
| 73 | Joseph Heichel | 68 | Head | Laborer | Pennsylvania |
| 74 | Flora Heichel | 55 | Wife | — | Pennsylvania |
| 75 | Jennie C. Purden | 82 | Mother-in-law | — | Maryland |
| 76 | Michael Benko | 34 | Head | Miner | Pennsylvania |
| 77 | Eva Benko | 31 | Wife | — | Pennsylvania |
| 78 | Marilyn Benko | 2 | Daughter | — | Pennsylvania |
| 79 | George Dubick | 45 | Head | Miner | Poland |
| 80 | Joe Dubick | 21 | Son | Miner | New Jersey |
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)