JK
John Kovach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Westmoreland-County, Pennsylvania
Our Model Tree links this John Kovach across the 1920, 1930 and 1940 US Censuses in Westmoreland-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 4-person household.
Age 56
b. ~1884
Male
Head
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Westmoreland-County, Pennsylvania |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Salem Township |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Township / Ward | Salem Township |
| Est. Birth Year | ~1884 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Natalie Kovach | Daughter | — | 10 | ~1930 |
| Mary Kovach | Spouse | — | — | |
| Theresa Kovach | Daughter | — | 7 | ~1933 |
| John Kovach | Head | — | 56 | ~1884 |
Census Appearances
1920
Allegheny, Pennsylvania
Head, age 34
Allegheny, Pennsylvania · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovacs |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Russia |
| Year of Immigration | 1913 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | R |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1930
Allegheny, Pennsylvania
Head, age 45
Allegheny, Pennsylvania · implied b. ~1885 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovac |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 32 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Russian |
| Home Owned/Rented | R |
| Home Value / Rent | 20.00 |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Westmoreland-County, Pennsylvania
Head, age 56
Westmoreland-County, Pennsylvania · implied b. ~1884 — 4 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Salem Township |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 Kovach across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kovach
Head · 1940 · age 56 · b. ~1884 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Westmoreland-County, Pennsylvania
Open full size
1940 US Federal Census — Westmoreland-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03637-00089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mike Samoniak | 35 | Boarder | Miner | Austria/Hung |
| 42 | Pete Mazur | 60 | Head | Miner | Poland |
| 43 | Katherine Mazur | 52 | Wife | — | Poland |
| 44 | Nick Zeleznik | 45 | Head | Cutter | Yugoslavia |
| 45 | Anne Zeleznik | 35 | Wife | — | Yugoslavia |
| 46 | Nick Jr Zeleznik | 16 | Son | New Worker | Penna |
| 47 | James Skiavo | 20 | Head | Miner | Penna |
| 48 | Helen Skiavo | 21 | Wife | Clerk | Penna |
| 49 | James Jr Skiavo | 0 | Son | — | Penna |
| 50 | Alfonso Guala | 34 | Head | Laborer | Italy |
| 51 | Helen Guala | 25 | Wife | — | Penna |
| 52 | Sandra Guala | 4 | Daughter | — | Penna |
| 53 | Mary Lou Guala | 0 | Daughter | — | Penna |
| 54 | Michael Hozinko | 57 | Head | Miner | Austria/Hung |
| 55 | Mary Hozinko | 54 | Wife | — | Austria/Hung |
| 56 | John Hozinko | 30 | Son | Motorman | Penna |
| 57 | Mike Hozinko | 23 | Son | Miner | Penna |
| 58 | Steve Hozinko | 21 | Son | Miner | Penna |
| 59 | Nick Hozinko | 15 | Son | New Worker | Penna |
| 60 | Sophia Hozinko | 12 | Daughter | — | Penna |
| 61 | Mary Hozinko | 10 | Daughter | — | Penna |
| 62 | Joseph Supal | 43 | Head | Miner | Poland |
| 63 | Anna Supal | 43 | Wife | — | Poland |
| 64 | Jennie Supal | 16 | Daughter | — | Penna |
| 65 | Stanley Supal | 8 | Son | — | Penna |
| 66 | Michael Kulik | 27 | Head | Miner | Austria |
| 67 | Helen Kulik | 21 | Wife | — | Penna |
| 68 | Gertrude Kulik | 4 | Daughter | — | Penna |
| 69 | Michael Jr Kulik | 1 | Son | — | Penna |
| 70 | Anna Brahosky | 59 | Head | — | Poland |
| 71 | John Brahosky | 27 | Son | Bus Boy | Penna |
| 72 | Irene Brahosky | 23 | Daughter | — | Penna |
| 73 | Joseph Brahosky | 20 | Son | Miner | Penna |
| 74 | John Slachta | 65 | Head | Miner | Poland |
| 75 | John Kovach THIS PERSON | 56 | Head | — | Russia |
| 76 | Mary Kovach | None | Wife | — | West Virginia |
| 77 | Natalie Kovach | 10 | Daughter | — | Penna |
| 78 | Theresa Kovach | 7 | Daughter | — | Penna |
| 79 | S. L. Thegus | 60 | Head | Engineer | Penna |
| 80 | Paul L. Thegus | 13 | Son | — | Penna |
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)