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John Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Union, New Jersey
Our Model Tree links this John Kowalski across the 1920 and 1930 US Censuses in Union, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 8-person household.
Age 37
b. ~1893
Male
Head
Born: Austria
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Union, New Jersey |
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1915 |
| Age at First Marriage | 22 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Additional Details | |
| Occupation | Laborer |
| Industry | Paper Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Ukrainian |
| Home Owned/Rented | R |
| Home Value / Rent | 22 |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Occupation | Laborer |
| Township / Ward | Elizabeth 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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kowalski | Son | — | 14 | ~1916 |
| Sophia Kowalski | Daughter | — | 6 | ~1924 |
| Mary Kowalski | Daughter | — | 11 | ~1919 |
| Andrew Kowalski | Son | — | 4 | ~1926 |
| Mary Kowalski | Spouse | — | 31 | ~1899 |
| John Kowalski | Head | — | 37 | ~1893 |
| Anna Kowalski | Daughter | — | 8 | ~1922 |
| Helen Kowalski | Daughter | — | 10 | ~1920 |
Census Appearances
1920
Essex, New …
Other, age 25
Essex, New Jersey · implied b. ~1895 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalsky |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Austria |
| Naturalization Status | Un |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Labour |
| Industry | Leather |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Austrian |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Union, New …
Head, age 37
Union, New Jersey · implied b. ~1893 — 8 household members
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1915 |
| Age at First Marriage | 22 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Laborer |
| Industry | Paper Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Ukrainian |
| Home Owned/Rented | R |
| Home Value / Rent | 22 |
| 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 Kowalski across 2 US Census years (1920 and 1930) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kowalski
Head · 1930 · age 37 · b. ~1893 · New Jersey
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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 — Union, New Jersey
Open full size
1930 US Federal Census — Union, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1385:0750)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna | 52 | Wife | — | Ireland |
| 2 | Charles | 24 | Son | Clerk | New Jersey |
| 3 | Beatrice | 25 | Daughter | Teacher | New Jersey |
| 4 | James | 24 | Son | Clerk | New Jersey |
| 5 | James Taggart | 60 | Head | Laborer | New Jersey |
| 6 | John Matusiak | 32 | Head | — | Poland |
| 7 | Anna Matusiak | 32 | Wife | — | Penn |
| 8 | Victoria Matusiak | 13 | Daughter | — | Penn |
| 9 | Stella Matusiak | 12 | Daughter | — | Penn |
| 10 | Katie Matusiak | 7 | Daughter | — | Penn |
| 11 | John Kowalski | 40 | Head | Laborer | Austria-Galicia |
| 12 | Mary Kowalski | 38 | Wife | — | Austria-Galicia |
| 13 | John Kowalski | 11 | Son | — | Galicia |
| 14 | Helen Kowalski | 10 | Daughter | — | Galicia |
| 15 | Mary Kowalski | 8 | Daughter | — | Galicia |
| 16 | John Sadowski | 38 | Head | Laborer | Poland |
| 17 | Mary Sadowski | 37 | Wife | — | Poland |
| 18 | John Sadowski | 14 | Son | — | Poland |
| 19 | Frank Sadowski | 11 | Son | — | New Jersey |
| 20 | Edward Sadowski | 10 | Son | — | New Jersey |
| 21 | Helen Sadowski | 8 | Daughter | — | New Jersey |
| 22 | Mary Sadowski | 6 | Daughter | — | New Jersey |
| 23 | Richard Sadowski | 2 | Son | — | New Jersey |
| 24 | John Kowalski THIS PERSON | 37 | Head | Laborer | Austria |
| 25 | Mary Kowalski | 31 | Wife | — | Austria |
| 26 | John Kowalski | 14 | Son | — | Pennsylvania |
| 27 | Mary Kowalski | 11 | Daughter | — | Pennsylvania |
| 28 | Helen Kowalski | 10 | Daughter | — | Pennsylvania |
| 29 | Anna Kowalski | 8 | Daughter | — | New Jersey |
| 30 | Sophia Kowalski | 6 | Daughter | — | New Jersey |
| 31 | Andrew Kowalski | 4 | Son | — | New Jersey |
| 32 | John Kowalski | 39 | Head | Laborer | Ukraine |
| 33 | Mary Kowalski | 37 | Wife | — | Ukraine |
| 34 | Andrew Zabawa | 41 | Head | Laborer | Poland |
| 35 | Mary Zabawa | 38 | Wife | — | Poland |
| 36 | John Zabawa | 9 | Son | — | Poland |
| 37 | John Zombeck | 41 | Head | Machinist | Austria |
| 38 | Sarah Zombeck | 42 | Wife | — | Austria |
| 39 | Anna Zombeck | 12 | Daughter | — | Pennsylvania |
| 40 | John Zombeck | 11 | Son | — | Pennsylvania |
| 41 | Mary Zombeck | 9 | Daughter | — | Pennsylvania |
| 42 | Sophia Zombeck | 6 | Daughter | — | Pennsylvania |
| 43 | John Zombeck | 36 | Head | Clerk | Germany |
| 44 | Mary Zombeck | 34 | Wife | Yes | Germany |
| 45 | John Marciniak | 47 | Head | Laborer | Poland |
| 46 | Mary Marciniak | 47 | Wife | — | Poland |
| 47 | Sophia Marciniak | 17 | Daughter | — | New Jersey |
| 48 | Leo Marciniak | 13 | Son | — | New Jersey |
| 49 | William Marciniak | 12 | Son | — | New Jersey |
| 50 | Peter Marciniak | 5 | Son | — | 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)