JK
John Kovach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this John Kovach across the 1920, 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 11-person household.
Age 61
b. ~1879
Male
Head
Born: Czecho-Slovakia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Czecho-Slovakia |
| 1935 Residence (City) | Lost Creek #2 |
| 1935 Residence (County) | Schuylkill |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | Colliery |
| Class of Worker | PW |
| Hours Worked | 53 |
| Income (1939) | 230 |
| Highest Grade | 2 |
| 1935 Residence | Penna |
| Birthplace (normalized) | czecho-slovakia |
| Occupation | Laborer |
| Township / Ward | Lost Creek 2 |
| Est. Birth Year | ~1879 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Stephen Kovach | Son | — | 25 | ~1915 |
| Mary Swoyer | Daughter | — | 35 | ~1905 |
| Paul Swoyer | Other | — | 1 | ~1939 |
| Mary Kovach | Spouse | — | 60 | ~1880 |
| Michael Kovach | Son | — | 27 | ~1913 |
| Clayton Swoyer | Other | — | 11 | ~1929 |
| Margaret Swoyer | Other | — | 14 | ~1926 |
| John Kovach | Son | — | 31 | ~1909 |
| Stephen Swoyer | Other | — | 2 | ~1938 |
| Clayton Swoyer | Other | — | 48 | ~1892 |
| John Kovach | Head | — | 61 | ~1879 |
Census Appearances
1920
Cuyahoga, Ohio
Other, age 39
Cuyahoga, Ohio · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Czecho-Slovakia |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Czecho-Slovakia |
| Mother's Birthplace | Czecho-Slovakia |
| Occupation | Laborer |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Slovak |
| Birthplace (normalized) | czecho-slovakia |
1930
Wayne, Michigan
Head, age 50
Wayne, Michigan · implied b. ~1880 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Czecho-Slovakia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 27 |
| Father's Birthplace | Czecho-Slovakia |
| Mother's Birthplace | Czecho-Slovakia |
| Occupation | Repairman |
| Industry | Auto factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Home Owned/Rented | R |
| Home Value / Rent | 50 |
| Radio Set | R |
| Veteran | No |
| Birthplace (normalized) | czecho-slovakia |
1940
Schuylkill-County, Pennsylvania
Head, age 61
Schuylkill-County, Pennsylvania · implied b. ~1879 — 11 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Czecho-Slovakia |
| 1935 Residence (City) | Lost Creek #2 |
| 1935 Residence (County) | Schuylkill |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Colliery |
| Class of Worker | PW |
| Hours Worked | 53 |
| Income (1939) | 230 |
| Highest Grade | 2 |
| 1935 Residence | Penna |
| Birthplace (normalized) | czecho-slovakia |
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 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kovach
Head · 1940 · age 61 · b. ~1879 · 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 — Schuylkill-County, Pennsylvania
Open full size
1940 US Federal Census — Schuylkill-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03607-00804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy Gilroy | 43 | Head | Seamstress | Penna |
| 42 | Martin Gilroy | 16 | Son | — | Penna |
| 43 | Dorothy Gilroy | 14 | Daughter | — | Penna |
| 44 | Michael Gilroy | 13 | Son | — | Penna |
| 45 | Edward Gilroy | 10 | Son | — | Penna |
| 46 | Patrick Gilroy | 9 | Son | — | Penna |
| 47 | Anna Gilroy | 6 | Daughter | — | Penna |
| 48 | Evelyn Leach | 18 | Daughter | Laborer | Penna |
| 49 | John Zyaley | 38 | Head | — | Penna |
| 50 | Mary Zyaley | 26 | Wife | — | Penna |
| 51 | Mary Zyaley | 1 | Daughter | — | Penna |
| 52 | Julia Galinas | 72 | Head | — | Lithuania |
| 53 | Frank Puscevage | 58 | Head | Miner | Lithuania |
| 54 | Margaret Puscevage | 55 | Wife | — | Lithuania |
| 55 | Thomas Puscevage | 25 | Son | New Worker | Penna |
| 56 | Charles Puscevage | 21 | Son | Laborer | Penna |
| 57 | Joseph Christopaitis | 26 | Head | Miner | Penna |
| 58 | Julia Christopaitis | 20 | Wife | — | Penna |
| 59 | Anna Christopaitis | 1 | Daughter | — | Penna |
| 60 | Michael Hoytunich | 60 | Head | Miner | Poland |
| 61 | Mary Hoytunich | 56 | Wife | — | Lithuania |
| 62 | John Kovach THIS PERSON | 61 | Head | Laborer | Czecho-Slovakia |
| 63 | Mary Kovach | 60 | Wife | — | Czecho-Slovakia |
| 64 | John Kovach | 31 | Son | Laborer | Penna |
| 65 | Michael Kovach | 27 | Son | Laborer | Penna |
| 66 | Stephen Kovach | 25 | Son | Truck Driver | Penna |
| 67 | Clayton E. Swoyer | 48 | Son-in-law | Carpenter | Penna |
| 68 | Mary Swoyer | 35 | Daughter | — | Penna |
| 69 | Margaret Swoyer | 14 | Granddaughter | — | Penna |
| 70 | Clayton Swoyer | 11 | Grandson | — | Penna |
| 71 | Stephen Swoyer | 2 | Grandson | — | Penna |
| 72 | Paul Joseph Swoyer | 1 | Grandson | — | Penna |
| 73 | Patrick Murphy | 54 | Head | Laborer | Penna |
| 74 | Nora Murphy | 58 | Wife | — | Penna |
| 75 | Thomas Murphy | 26 | Son | Laborer | Penna |
| 76 | Jane Murphy | 24 | Daughter | Collar Finisher | Penna |
| 77 | Winifred Murphy | 18 | Daughter | — | Penna |
| 78 | John Cavanaugh | 52 | Head | — | Penna |
| 79 | Catherine Cavanaugh | 49 | Wife | — | Penna |
| 80 | Mary Cavanaugh | 22 | Daughter | Cooking-Aid | 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)