JK
John Kovach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Northumberland, Pennsylvania
Our Model Tree links this John Kovach across the 1920, 1930 and 1940 US Censuses in Northumberland, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1894), then head of a 5-person household.
Age 36
b. ~1894
Male
Head
Born: Austria
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Northumberland, Pennsylvania |
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 18 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Occupation | Miner |
| Township / Ward | Mt Carmel Borough |
| Est. Birth Year | ~1894 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Agnes Kovach | Daughter | — | 11 | ~1919 |
| John Kovach | Head | — | 36 | ~1894 |
| Edward Kovach | Son | — | 13 | ~1917 |
| Mary Kovach | Spouse | — | 35 | ~1895 |
| Thomas Kovach | Son | — | 8 | ~1922 |
Census Appearances
1920
Fayette, Pennsylvania
Head, age 26
Fayette, Pennsylvania · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Austria |
| Year of Immigration | 1908 |
| Naturalization Status | Alien |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Horwat |
| Home Owned/Rented | R |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Northumberland, Pennsylvania
Head, age 36
Northumberland, Pennsylvania · implied b. ~1894 — 5 household members
| Surname | Kovach |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 18 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Northumberland-County, Pennsylvania
Head, age 47
Northumberland-County, Pennsylvania · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovack |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Mt. Carmel |
| 1935 Residence (County) | Northumberland |
| Naturalization Status | Naturalized |
| Occupation | Labor |
| Industry | Coal Mining |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 400 |
| Highest Grade | No |
| 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 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
John Kovach
Head · 1930 · age 36 · b. ~1894 · 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 — Northumberland, Pennsylvania
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1930 US Federal Census — Northumberland, Pennsylvania
Page Contents
49 people indexed on this census page (ia:1930:fifteenthcensus00reel2090:0830)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Klinger | 60 | Head | — | Pennsylvania |
| 2 | Clarence Guthrie | 30 | Son-in-law | Electrician | Pennsylvania |
| 3 | Hattie Guthrie | 30 | Daughter | — | Pennsylvania |
| 4 | Betty Guthrie | 7 | Granddaughter | — | Pennsylvania |
| 5 | Sylvia Guthrie | 3 | Granddaughter | — | Pennsylvania |
| 6 | William Guthrie | 1 | Grandson | — | Pennsylvania |
| 7 | Louis Campbell | 70 | Boarder | Laborer | Pennsylvania |
| 8 | Phillip Kukilla | 38 | Head | Laborer | Pennsylvania |
| 9 | Anna Kukilla | 28 | Wife | — | Pennsylvania |
| 10 | Gertrude Kukilla | 3 | Daughter | — | Pennsylvania |
| 11 | Eugene Kukilla | 2 | Son | — | Pennsylvania |
| 12 | Rosalie Kukilla | 0 | Daughter | — | Pennsylvania |
| 13 | George Stephen | 22 | Brother-in-law | Laborer | Pennsylvania |
| 14 | Mary Stephen | 15 | Sister-in-law | — | Pennsylvania |
| 15 | Fred Dietz | 34 | Head | Laborer | Pennsylvania |
| 16 | Catherine Dietz | 30 | Wife | — | Pennsylvania |
| 17 | Robert Dietz | 11 | Son | — | Pennsylvania |
| 18 | Beatrice Dietz | 0 | Daughter | — | Pennsylvania |
| 19 | Ralph Clark | 18 | Brother-in-law | Laborer | Pennsylvania |
| 20 | William Mchale | 54 | Head | Miner | Pennsylvania |
| 21 | Catherine Mchale | 54 | Wife | — | Pennsylvania |
| 22 | Vincent Mchale | 18 | Son | Laborer | Pennsylvania |
| 23 | Thomas Mchale | 16 | Son | — | Pennsylvania |
| 24 | Ellen Mchale | 13 | Daughter | — | Pennsylvania |
| 25 | Mary Mchale | 10 | Daughter | — | Pennsylvania |
| 26 | Mildred Mchale | 8 | Daughter | — | Pennsylvania |
| 27 | Anna Mchale | 6 | Daughter | — | Pennsylvania |
| 28 | Francis Mchale | 5 | Grandson | — | Pennsylvania |
| 29 | Hosea Rettinger | 29 | Head | Laborer | Pennsylvania |
| 30 | Mary Rettinger | 26 | Wife | — | Pennsylvania |
| 31 | James Rettinger | 3 | Son | — | Pennsylvania |
| 32 | Mary Balonis | 22 | Boarder | Driller | Pennsylvania |
| 33 | Matthew Ayers | 66 | Head | Laborer | England |
| 34 | Agnes Ayers | 62 | Wife | — | Pennsylvania |
| 35 | Matthew Ayers | 14 | Grandson | — | Pennsylvania |
| 36 | John Kovach THIS PERSON | 36 | Head | Miner | Austria |
| 37 | Mary Kovach | 35 | Wife | — | Pennsylvania |
| 38 | Edward Kovach | 13 | Son | — | Pennsylvania |
| 39 | Agnes Kovach | 11 | Daughter | — | Pennsylvania |
| 40 | Thomas Kovach | 8 | Son | — | Pennsylvania |
| 41 | Bernard Reisimiller | 64 | Head | Miner | Germany |
| 42 | Annie Reisimiller | 61 | Wife | — | Pennsylvania |
| 43 | Justin George | 47 | Head | Truck Driver | Pennsylvania |
| 44 | Hattie George | 44 | Wife | — | Pennsylvania |
| 45 | Ellsworth George | 21 | Son | Laborer | Pennsylvania |
| 46 | Charles George | 18 | Son | Laborer | Pennsylvania |
| 47 | Alberta George | 9 | Daughter | — | Pennsylvania |
| 48 | Hattie George | 6 | Daughter | — | Pennsylvania |
| 49 | John Adams | 42 | Boarder | Laborer | 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)