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Mary Kovach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, New Jersey
Our Model Tree links this Mary Kovach across the 1930 and 1940 US Censuses in Middlesex, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 9
b. ~1921
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, New Jersey |
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ukraine |
| Mother's Birthplace | Ukraine |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Carteret Borough |
| Est. Birth Year | ~1921 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Kovach | Son | — | 12 | ~1918 |
| Mary Kovach | Daughter | — | 9 | ~1921 |
| Mary Kovach | Spouse | — | 32 | ~1898 |
| Anna Kovach | Daughter | — | 10 | ~1920 |
| Catherine Kovach | Daughter | — | 5 | ~1925 |
| Helen Kovach | Daughter | — | 7 | ~1923 |
| Michael Kovach | Son | — | 1 | ~1929 |
| George Kovach | Son | — | 3 | ~1927 |
| John Kovach | Head | — | 44 | ~1886 |
Census Appearances
1930
Middlesex, New …
Daughter, age 9
Middlesex, New Jersey · implied b. ~1921 — 9 household members
| Surname | Kovach |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ukraine |
| Mother's Birthplace | Ukraine |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Middlesex-County, New …
Daughter, age 20
Middlesex-County, New Jersey · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kovak |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Unincorporated place |
| 1935 Residence (County) | Middlesex |
| Occupation | sales girl |
| Industry | store |
| Class of Worker | PW |
| Income (1939) | 280 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kovach
Daughter · 1930 · age 9 · b. ~1921 · New Jersey
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Sibling
Michael Kovach
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Kovach
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Kovach
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Kovach
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kovach
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kovach
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, New Jersey
Open full size
1930 US Federal Census — Middlesex, New Jersey
Page Contents
30 people indexed on this census page (ia:1930:newjerseycensus00reel1366:0046)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 71 | Mary Georgal | 11 | Daughter | — | New Jersey |
| 72 | Dorothy Georgal | 10 | Daughter | — | New Jersey |
| 73 | John Georgal | 8 | Son | — | New Jersey |
| 74 | Joseph Georgal | 1 | Son | — | New Jersey |
| 75 | Stephen Chopak | 38 | Head | Retail Merchant | Russia |
| 76 | Rose Chopak | 35 | Wife | — | Russia |
| 77 | Edward Chopak | 12 | Son | — | New Jersey |
| 78 | Mildred Chopak | 10 | Daughter | — | New Jersey |
| 79 | Mary Gabriel | 43 | Head | — | Belgium |
| 80 | Mary Gabriel | 17 | Daughter | — | New Jersey |
| 81 | John Kovach | 44 | Head | — | Ukraine |
| 82 | Mary Kovach | 32 | Wife | — | New Jersey |
| 83 | John Kovach | 12 | Son | — | New Jersey |
| 84 | Anna Kovach | 10 | Daughter | — | New Jersey |
| 85 | Mary Kovach THIS PERSON | 9 | Daughter | — | New Jersey |
| 86 | Helen Kovach | 7 | Daughter | — | New Jersey |
| 87 | Catherine Kovach | 5 | Daughter | — | New Jersey |
| 88 | George Kovach | 3 | Son | — | New Jersey |
| 89 | Michael Kovach | 1 | Son | — | New Jersey |
| 90 | George Kozlowsky | 40 | Head | Laborer | Poland |
| 91 | Mary Kozlowsky | 38 | Wife | — | Poland |
| 92 | Mary Kozlowsky | 17 | Daughter | — | New Jersey |
| 93 | George Kozlowsky | 15 | Son | — | New Jersey |
| 94 | John Kozlowsky | 13 | Son | — | New Jersey |
| 95 | Anna Kozlowsky | 11 | Daughter | — | New Jersey |
| 96 | Helen Kozlowsky | 7 | Daughter | — | New Jersey |
| 97 | Michael Kozlowsky | 5 | Son | — | New Jersey |
| 98 | Joseph Kozlowsky | 3 | Son | — | New Jersey |
| 99 | Stanley Kozlowsky | 1 | Son | — | New Jersey |
| 100 | Julia Kozlowsky | 0 | Daughter | — | New Jersey |
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)