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.~1893), then head of a 5-person household.
Age 47
b. ~1893
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 | 47 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1893 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kovach | Spouse | — | 47 | ~1893 |
| Elizabeth Kovach | Daughter | — | 12 | ~1928 |
| Stephen Kovach | Head | — | 53 | ~1887 |
| Nicholas Kovach | Son | — | 18 | ~1922 |
| John Kovach | Son | — | 14 | ~1926 |
Census Appearances
1920
Allegheny, Pennsylvania
Other, age 24
Allegheny, Pennsylvania · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovac |
| Given Name | Mary |
| Relationship to Head | servant |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Austria |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | servant |
| Industry | private family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Ruthenian |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Allegheny, Pennsylvania
Other, age 34
Allegheny, Pennsylvania · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovacs |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Age at First Marriage | 20 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Allegheny-County, Pennsylvania
Spouse, age 47
Allegheny-County, Pennsylvania · implied b. ~1893 — 5 household members
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 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 Mary 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
Mary Kovach
Spouse · 1940 · age 47 · b. ~1893 · Pennsylvania
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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-t0627-03675-00616)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Minnie Bummer | 71 | Mother | — | Germany |
| 2 | Maurice Pimmilla | 52 | Lodger | — | Pennsylvania |
| 3 | Carrie Randolph | 48 | Head | Checker | Pennsylvania |
| 4 | Carl Randolph | 23 | Son | Receiver | Pennsylvania |
| 5 | Edward Randolph | 18 | Son | Sorter | Pennsylvania |
| 6 | William Randolph | 16 | Son | Driver | Pennsylvania |
| 7 | Julia Ivancik | 54 | Head | — | Pennsylvania |
| 8 | Michael Ivancik | 22 | Son | Trackman | Pennsylvania |
| 9 | Peter Ivancik | 20 | Son | Printer Helper | Pennsylvania |
| 10 | Catherine Ivancik | 18 | Daughter | Maid | Pennsylvania |
| 11 | Helen Ivancik | 16 | Daughter | — | Pennsylvania |
| 12 | Paul Ivancik | 10 | Son | — | Pennsylvania |
| 13 | Rose Ivancik | 13 | Daughter | — | Pennsylvania |
| 14 | Michael Leybeck | 46 | Head | Molder | Germany |
| 15 | Mary Leybeck | 44 | Wife | — | Germany |
| 16 | Michael Jr Leybeck | 19 | Son | — | Pennsylvania |
| 17 | Rose Leybeck | 16 | Daughter | — | Pennsylvania |
| 18 | Alice Leybeck | 13 | Daughter | — | Pennsylvania |
| 19 | Marion Jean Leybeck | 5 | Daughter | — | Pennsylvania |
| 20 | Stephen Kovach | 53 | Head | — | Austria |
| 21 | Mary Kovach THIS PERSON | 47 | Wife | — | Austria |
| 22 | John Kovach | 14 | Son | — | Pennsylvania |
| 23 | Nicholas Jr Kovach | 18 | Son | — | Pennsylvania |
| 24 | Elizabeth Kovach | 12 | Daughter | — | Pennsylvania |
| 25 | Samuel Thomas | 36 | Head | Stenographer | Pennsylvania |
| 26 | Helen Thomas | 28 | Wife | Waitress | Pennsylvania |
| 27 | Stella Kalic | 26 | Sister | — | Pennsylvania |
| 28 | Robert Kalic | 4 | Son | — | Pennsylvania |
| 29 | William Howcraft | 67 | Head | — | Pennsylvania |
| 30 | Charles H. Howcraft | 38 | Son | Laborer | Pennsylvania |
| 31 | George Stanuch | 38 | Head | Laborer | Pennsylvania |
| 32 | Anna Stanuch | 36 | Wife | — | Pennsylvania |
| 33 | Mary L. Stanuch | 4 | Daughter | — | Pennsylvania |
| 34 | William D. O'Brien | 28 | Head | Cement Finisher | Pennsylvania |
| 35 | Josephine O'Brien | 25 | Wife | Waitress | Pennsylvania |
| 36 | Margaret Bebenek | 65 | Head | — | Russia |
| 37 | Leonard Bebenek | 17 | Nephew | — | Pennsylvania |
| 38 | Michael Sestok | 55 | Brother | Truck Driver | Austria |
| 39 | John Praskovich | 27 | Nephew | Laborer | Pennsylvania |
| 40 | Joseph Burri | 18 | Lodger | — | Pennsylvania |
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)