JK
John Kovach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this John Kovach across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 8-person household.
Age 50
b. ~1880
Male
Head
Born: Austria
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1904 |
| Age at First Marriage | 24 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Additional Details | |
| Occupation | Labor |
| Industry | Wire Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Home Owned/Rented | R |
| Home Value / Rent | 14.00 |
| Veteran | No |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Occupation | Labor |
| Township / Ward | Braddock Borough |
| Est. Birth Year | ~1880 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Steve Kovach | Son | — | 7 | ~1923 |
| John Kovach | Son | — | 12 | ~1918 |
| Mary Kovach | Spouse | — | 43 | ~1887 |
| Helen Kovach | Daughter | — | 9 | ~1921 |
| Ann Kovach | Daughter | — | 16 | ~1914 |
| Mary Kovach | Daughter | — | 19 | ~1911 |
| Florence Kovach | Daughter | — | 5 | ~1925 |
| John Kovach | Head | — | 50 | ~1880 |
Census Appearances
1900
Allegheny, Pennsylvania
Head, age 23
Allegheny, Pennsylvania · implied b. ~1877 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovic |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Austria |
| Birth Month | Jan |
| Birth Year | 1877 |
| Year of Immigration | 1898 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Mill Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1910
Allegheny, Pennsylvania
Head, age 30
Allegheny, Pennsylvania · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Austria |
| Years Married | 11 |
| Year of Immigration | 1901 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Laborer |
| Industry | Steel Works |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1920
Allegheny, Pennsylvania
Head, age 40
Allegheny, Pennsylvania · implied b. ~1880 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Austria |
| Year of Immigration | 1905 |
| Naturalization Status | Alien |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Loader |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Mother Tongue | Slovak |
| Home Owned/Rented | R |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Allegheny, Pennsylvania
Head, age 50
Allegheny, Pennsylvania · implied b. ~1880 — 8 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1904 |
| Age at First Marriage | 24 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Labor |
| Industry | Wire Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Home Owned/Rented | R |
| Home Value / Rent | 14.00 |
| Veteran | No |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Allegheny-County, Pennsylvania
Head, age 60
Allegheny-County, Pennsylvania · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovac |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Austria |
| 1935 Residence (City) | nr |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Alien |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
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 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kovach
Head · 1930 · age 50 · b. ~1880 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel1960:0704)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lou Anthony | 6 | Son | — | Pennsylvania |
| 52 | Irena Anthony | 4 | Daughter | — | Pennsylvania |
| 53 | Agnes Anthony | 2 | Daughter | — | Pennsylvania |
| 54 | Mike Lukanich | 50 | Head | Labor | Austria |
| 55 | Teresa Lukanich | 48 | Wife | — | Austria |
| 56 | Mary Lukanich | 18 | Daughter | Waitress | Pennsylvania |
| 57 | Anna Lukanich | 15 | Daughter | Housework | Pennsylvania |
| 58 | Helen Lukanich | 10 | Daughter | — | Pennsylvania |
| 59 | John Lukanich | 9 | Son | — | Pennsylvania |
| 60 | Eddie Lukanich | 6 | Son | — | Pennsylvania |
| 61 | Steve Lukanich | 3 | Son | — | Pennsylvania |
| 62 | Margaret Lukanich | 1 | Daughter | — | Pennsylvania |
| 63 | John Varchina | 35 | Head | Labor | Czechoslovakia |
| 64 | Anna Varchina | 31 | Wife | — | Czechoslovakia |
| 65 | George Shortis | 49 | Head | Labor | Austria |
| 66 | Julia Shortis | 46 | Wife | — | Austria |
| 67 | George Shortis | 19 | Son | Helper | Pennsylvania |
| 68 | Mike Shortis | 13 | Son | — | Pennsylvania |
| 69 | John Kovach THIS PERSON | 50 | Head | Labor | Austria |
| 70 | Mary Kovach | 43 | Wife | — | Austria |
| 71 | Mary Kovach | 19 | Daughter | Housework | Pennsylvania |
| 72 | Ann Kovach | 16 | Daughter | Housework | Pennsylvania |
| 73 | John Kovach | 12 | Son | — | Pennsylvania |
| 74 | Helen Kovach | 9 | Daughter | — | Pennsylvania |
| 75 | Steve Kovach | 7 | Son | — | Pennsylvania |
| 76 | Florence Kovach | 5 | Daughter | — | Pennsylvania |
| 77 | Sadie Lack | 55 | Head | Housework | Austria |
| 78 | Ann Lack | 15 | Daughter | — | Pennsylvania |
| 79 | John Lack | 11 | Son | — | Pennsylvania |
| 80 | Mary Lack | 7 | Daughter | — | Pennsylvania |
| 81 | Mike Lack | 4 | Son | — | Pennsylvania |
| 82 | Steve Lack | 2 | Son | — | Pennsylvania |
| 83 | John James | 47 | Head | Labor | Austria |
| 84 | Mary James | 40 | Wife | — | Austria |
| 85 | Anna James | 19 | Daughter | Filler | Pennsylvania |
| 86 | Mary James | 17 | Daughter | — | Pennsylvania |
| 87 | John James | 1 | Son | — | Pennsylvania |
| 88 | John Matnick | 31 | Head | Labor | Austria |
| 89 | Mary Matnick | 31 | Wife | — | Austria |
| 90 | John Matnick | 11 | Son | — | Pennsylvania |
| 91 | Andy Matnick | 10 | Son | — | Pennsylvania |
| 92 | Ann Matnick | 8 | Daughter | — | Pennsylvania |
| 93 | Margaret Matnick | 5 | Daughter | — | Pennsylvania |
| 94 | Steve Matnick | 3 | Son | — | Pennsylvania |
| 95 | Paul Smovak | 47 | Head | Labor | Austria |
| 96 | Mary Smovak | 47 | Wife | — | Austria |
| 97 | Mary Smovak | 17 | Daughter | Sandpaperer | Pennsylvania |
| 98 | Ann Smovak | 15 | Daughter | Housework | Pennsylvania |
| 99 | Paul Smovak | 12 | Son | Helper | Pennsylvania |
| 100 | Mike Smovak | 10 | Son | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)