JK
John Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hudson, New Jersey
Our Model Tree links this John Kowalski across the 1920 and 1930 US Censuses in Hudson, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 9-person household.
Age 16
b. ~1914
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hudson, New Jersey |
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1914 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Stanley Kowalski | Son | — | 4 | ~1926 |
| Helen Kowalski | Daughter | — | 6 | ~1924 |
| Mary Kowalski | Spouse | — | 37 | ~1893 |
| John Kowalski | Son | — | 16 | ~1914 |
| Nellie Kowalski | Daughter | — | 12 | ~1918 |
| Verna Kowalski | Daughter | — | 14 | ~1916 |
| Stanley Kowalski | Head | — | 41 | ~1889 |
| Mary Kowalski | Daughter | — | 8 | ~1922 |
| Annie Kowalski | Daughter | — | 10 | ~1920 |
Census Appearances
1920
Hudson, New …
Son, age 5
Hudson, New Jersey · implied b. ~1915 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 16
Hudson, New Jersey · implied b. ~1914 — 9 household members
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| 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 John Kowalski across 2 US Census years (1920 and 1930) in Hudson, New Jersey, using XGBoost record linkage.
Show:
This person
Anchor record
John Kowalski
Son · 1930 · age 16 · b. ~1914 · New Jersey
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Sibling
Helen Kowalski
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Kowalski
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Kowalski
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verna Kowalski
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kowalski
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Kowalski
Sibling · 1930 · age 4
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 — Hudson, New Jersey
Open full size
1930 US Federal Census — Hudson, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1375:0992)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Kemia | 53 | Head | — | Poland |
| 2 | John Kemia | 23 | Son | Laborer | New Jersey |
| 3 | Mary Kemia | 16 | Daughter | — | New Jersey |
| 4 | Stanley Kemia | 12 | Son | — | New Jersey |
| 5 | Vatmiski | 42 | Boarder | Laborer | Poland |
| 6 | John Novicki | 40 | Head | Laborer | Poland |
| 7 | Anna Novicki | 38 | Wife | — | Poland |
| 8 | Anna Novicki | 17 | Daughter | — | New Jersey |
| 9 | Harry Novicki | 15 | Son | — | New Jersey |
| 10 | Helen Novicki | 13 | Daughter | — | New Jersey |
| 11 | Mary Novicki | 11 | Daughter | — | New Jersey |
| 12 | John Novicki | 9 | Son | — | New Jersey |
| 13 | Stanley Novicki | 7 | Son | — | New Jersey |
| 14 | Stanley Kowalski | 41 | Head | Laborer | Poland |
| 15 | Mary Kowalski | 37 | Wife | — | Poland |
| 16 | John Kowalski THIS PERSON | 16 | Son | — | New Jersey |
| 17 | Verna Kowalski | 14 | Daughter | — | New Jersey |
| 18 | Nellie Kowalski | 12 | Daughter | — | New Jersey |
| 19 | Annie Kowalski | 10 | Daughter | — | New Jersey |
| 20 | Mary Kowalski | 8 | Daughter | — | New Jersey |
| 21 | Helen Kowalski | 6 | Daughter | — | New Jersey |
| 22 | Stanley Kowalski | 4 | Son | — | New Jersey |
| 23 | Tony Adamiak | 40 | Head | Laborer | Poland |
| 24 | Mary Adamiak | 36 | Wife | — | Poland |
| 25 | Nellie Adamiak | 15 | Daughter | — | New Jersey |
| 26 | John Adamiak | 13 | Son | — | New Jersey |
| 27 | Annie Adamiak | 11 | Daughter | — | New Jersey |
| 28 | Mary Adamiak | 9 | Daughter | — | New Jersey |
| 29 | John Kulla | 41 | Head | Laborer | Poland |
| 30 | Bertha Kulla | 36 | Wife | — | Poland |
| 31 | John Kulla | 15 | Son | — | New Jersey |
| 32 | Mary Kulla | 13 | Daughter | — | New Jersey |
| 33 | Joseph Mickiewicz | 41 | Head | Laborer | Poland |
| 34 | Mary Mickiewicz | 36 | Wife | — | Poland |
| 35 | Joseph Mickiewicz | 15 | Son | — | New Jersey |
| 36 | Helen Mickiewicz | 13 | Daughter | — | New Jersey |
| 37 | John Mickiewicz | 11 | Son | — | New Jersey |
| 38 | Mary Mickiewicz | 9 | Daughter | — | New Jersey |
| 39 | Annie Mickiewicz | 7 | Daughter | — | New Jersey |
| 40 | Stanley Mickiewicz | 5 | Son | — | New Jersey |
| 41 | John Venta | 46 | Head | Laborer | Poland |
| 42 | Mary Venta | 41 | Wife | — | Poland |
| 43 | John Venta | 19 | Son | Laborer | New Jersey |
| 44 | Helen Venta | 17 | Daughter | — | New Jersey |
| 45 | Stanley Venta | 15 | Son | — | New Jersey |
| 46 | Walter Venta | 13 | Son | — | New Jersey |
| 47 | Mary Venta | 11 | Daughter | — | New Jersey |
| 48 | Frank Venta | 9 | Son | — | New Jersey |
| 49 | Annie Venta | 7 | Daughter | — | New Jersey |
| 50 | Joseph Venta | 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)