MK
Mary Kovach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Kovach across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 8-person household.
Age 44
b. ~1896
Female
Spouse
Born: Austria
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Clairton |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | G 8 |
| 1935 Residence | Same House |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Township / Ward | Clairton |
| Est. Birth Year | ~1896 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Kovach | Daughter | — | 11 | ~1929 |
| Michael Kovach | Son | — | 10 | ~1930 |
| John Kovach | Son | — | 23 | ~1917 |
| Mary Kovach | Spouse | — | 44 | ~1896 |
| Mary Kovach | Daughter | — | 15 | ~1925 |
| Mike Kovach | Head | — | 48 | ~1892 |
| Joseph Kovach | Son | — | 8 | ~1932 |
| Mike Kovach | Son | — | 21 | ~1919 |
Census Appearances
1920
Westmoreland, Pennsylvania
Spouse, age 24
Westmoreland, Pennsylvania · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Austria |
| Year of Immigration | 1914 |
| Naturalization Status | Alien |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Slavic |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Washington, Pennsylvania
Spouse, age 34
Washington, Pennsylvania · implied b. ~1896 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 17 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read/Write | Yes |
| Mother Tongue | Slovak |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Allegheny-County, Pennsylvania
Spouse, age 44
Allegheny-County, Pennsylvania · implied b. ~1896 — 8 household members
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Clairton |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Highest Grade | G 8 |
| 1935 Residence | Same House |
| 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 Mary 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
Mary Kovach
Spouse · 1940 · age 44 · b. ~1896 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03400-00378)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Everett Jones | 60 | Head | Mining Engineer | Ohio |
| 42 | Dessie May Jones | 53 | Wife | — | West Virginia |
| 43 | Beatrice May Jones | 19 | Daughter | New Worker | West Virginia |
| 44 | Joseph Clowritz | 68 | Head | Laborer | Austria |
| 45 | Mary Clowritz | 65 | Wife | — | Czechoslovaki |
| 46 | John Joseph Silek | 9 | Grandson | — | Penna |
| 47 | Josephine Silek | 26 | Daughter | Laborer | Penna |
| 48 | John Varick | 62 | Uncle | — | Austria |
| 49 | Virginia G. Doffis | 22 | Daughter | New Worker | Penna |
| 50 | T. John Kehoe | 26 | Head | Laborer | Penna |
| 51 | Helen O. Kehoe | 22 | Wife | — | Penna |
| 52 | John Patrick Kehoe | 2 | Son | — | Penna |
| 53 | Massenerio Cerasoli | 56 | Head | Laborer | Italy |
| 54 | Donata Cerasoli | 41 | Wife | — | Italy |
| 55 | Mary A. Cerasoli | 19 | Daughter | Laborer | Penna |
| 56 | Mafalda Cerasoli | 17 | Daughter | — | Penna |
| 57 | Guido Cerasoli | 15 | Son | — | Penna |
| 58 | Gloria Cerasoli | 11 | Daughter | — | Penna |
| 59 | James Cerasoli | 5 | Son | — | Penna |
| 60 | Vengenzo Desalvatori | 50 | Lodger | Laborer | Italy |
| 61 | Guido Bedenic | 50 | Lodger | Laborer | Italy |
| 62 | Elliott W. Everson | 32 | Head | Laborer | Virginia |
| 63 | Mary Lee Everson | 31 | Wife | — | North Carolina |
| 64 | Thurman Everson | 9 | Son | — | Penna |
| 65 | Vivian Everson | 2 | Daughter | — | Michigan |
| 66 | Thelma Everson | 0 | Daughter | — | Michigan |
| 67 | John Vossel | 34 | Head | Laborer | Penna |
| 68 | Helen V. Vossel | 30 | Wife | — | Penna |
| 69 | Donald Vossel | 12 | Son | — | Penna |
| 70 | Mike Kovach | 48 | Head | Laborer | Austria |
| 71 | Mary Kovach THIS PERSON | 44 | Wife | — | Austria |
| 72 | Helen Kovach | 11 | Daughter | — | Penna |
| 73 | John Kovach | 23 | Son | Laborer | Penna |
| 74 | Mike Kovach | 21 | Son | Laborer | Penna |
| 75 | Mary Kovach | 15 | Daughter | — | Penna |
| 76 | Michael Kovach | 10 | Son | — | Penna |
| 77 | Joseph Kovach | 8 | Son | — | Penna |
| 78 | Stanley Gregorek | 45 | Head | Miner (Coal) | Poland |
| 79 | Sophie Gregorek | 42 | Wife | — | Poland |
| 80 | Rosie Gregorek | 16 | Daughter | New Worker | 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)