FK
Frank Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, New Jersey
Our Model Tree links this Frank Kowalski across the 1930 and 1940 US Censuses in Middlesex-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, New Jersey |
| Surname | Kowalski |
| Given Name | Frank Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Brunswick |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | New Brunswick |
| Est. Birth Year | ~1923 |
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 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Walter Kowalski | Son | — | 22 | ~1918 |
| Mary Kowalski | Daughter | — | 9 | ~1931 |
| Frank Kowalski | Head | — | 47 | ~1893 |
| Anna Kowalski | Spouse | — | 49 | ~1891 |
| Frank Kowalski | Son | — | 17 | ~1923 |
| Joseph Kowalski | Son | — | 23 | ~1917 |
| John Kowalski | Son | — | 11 | ~1929 |
| Florian Kowalski | Son | — | 16 | ~1924 |
| Stanley Kowalski | Son | — | 21 | ~1919 |
Census Appearances
1930
Middlesex, New …
Son, age 5
Middlesex, New Jersey · implied b. ~1925 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalsky |
| Given Name | Frank |
| 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 |
1940
Middlesex-County, New …
Son, age 17
Middlesex-County, New Jersey · implied b. ~1923 — 9 household members
| Surname | Kowalski |
| Given Name | Frank Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Brunswick |
| 1935 Residence (County) | Middlesex |
| Highest Grade | H-1 |
| 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 Frank Kowalski across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Frank Kowalski
Son · 1940 · age 17 · b. ~1923 · New Jersey
★ You are viewing this record
Sibling
John Kowalski
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Kowalski
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kowalski
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florian Kowalski
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kowalski
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Kowalski
Sibling · 1940 · age 22
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
1940 US Federal Census — Middlesex-County, New Jersey
Open full size
1940 US Federal Census — Middlesex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02360-00312)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Constantine Marcic | 42 | Head | Shipper | Hungary |
| 42 | Lucy Marcic | 19 | Daughter | Turner | New Jersey |
| 43 | Alice Marcic | 15 | Daughter | — | New Jersey |
| 44 | Richard Marcic | 11 | Son | — | New Jersey |
| 45 | Teresa Marcic | 9 | Daughter | — | New Jersey |
| 46 | Nicholas Marcic | 7 | Son | — | New Jersey |
| 47 | William Lubashewitz | 27 | Head | Orderly | New Jersey |
| 48 | Helen Lubashewitz | 20 | Sister | — | New Jersey |
| 49 | Peter Lubashewitz | 16 | Brother | — | New Jersey |
| 50 | Frank Kowalski | 47 | Head | Painter | Russia |
| 51 | Anna Kowalski | 49 | Wife | — | Poland |
| 52 | Joseph Kowalski | 23 | Son | Press Operator | New Jersey |
| 53 | Walter Kowalski | 22 | Son | Laborer | New Jersey |
| 54 | Stanley Kowalski | 21 | Son | Dishwasher | New Jersey |
| 55 | Frank Jr. Kowalski THIS PERSON | 17 | Son | — | New Jersey |
| 56 | Florian Kowalski | 16 | Son | — | Pennsylvania |
| 57 | John Kowalski | 11 | Son | — | New Jersey |
| 58 | Mary Kowalski | 9 | Daughter | — | New Jersey |
| 59 | Melicent Perkins | 54 | Head | Operator | New York |
| 60 | Faye Shaffer | 41 | Sister | — | New York |
| 61 | Rudolph Keenen | 45 | Lodger | Machinist | New Jersey |
| 62 | Frank Masterson | 50 | Partner | Electrician | New Jersey |
| 63 | Theresa Masterson | 52 | Partner | — | New Jersey |
| 64 | Matilda Johnson | 54 | Head | — | New Jersey |
| 65 | Laura Johnson | 30 | Daughter | Switchboard Operator | New Jersey |
| 66 | George Korbacsi | 25 | Head | Motorcycle Mechanic | New Jersey |
| 67 | Lillian Korbacsi | 20 | Wife | — | New Jersey |
| 68 | George Jr. Korbacsi | 2 | Son | — | New Jersey |
| 69 | Barbara Korbacsi | 1 | Daughter | — | New Jersey |
| 70 | Joseph Sohonyay | 35 | Head | Butcher | Hungary |
| 71 | Mary Sohonyay | 35 | Wife | — | W. Virginia |
| 72 | James Kubov | 63 | Head | — | Hungary |
| 73 | Joseph Marosits | 41 | Head | Tailor Shop | Hungary |
| 74 | Mary Marosits | 34 | Wife | Finisher | Pennsylvania |
| 75 | Mary Marosits | 13 | Daughter | — | New Jersey |
| 76 | Joseph Jr. Marosits | 11 | Son | — | New Jersey |
| 77 | Matthew Deiner | 45 | Head | Laborer | New Jersey |
| 78 | Ellen Deiner | 30 | Wife | — | New Jersey |
| 79 | Lillian Ruck | 52 | Head | — | New Jersey |
| 80 | Clarence Ruck | 30 | Son | Boat Builder | New Jersey |
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)