FK
Frank Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Frank Kowalski across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Frank & Mary — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Die-setter |
| Industry | Cloth-Factory |
| Class of Worker | PW |
| Hours Worked | 49 |
| Income (1939) | 950 |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Die-Setter |
| Township / Ward | Trenton 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Mary Kowalski | Daughter | — | 33 | ~1907 |
| Frank Kowalski | Son | — | 26 | ~1914 |
| Pauline Kowalski | Head | — | 57 | ~1883 |
Census Appearances
1920
Mercer, New …
Son, age 4
Mercer, New Jersey · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| 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
Mercer, New …
Son, age 14
Mercer, New Jersey · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 26
Mercer-County, New Jersey · implied b. ~1914 — 3 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Occupation | Die-setter |
| Industry | Cloth-Factory |
| Class of Worker | PW |
| Hours Worked | 49 |
| Income (1939) | 950 |
| Highest Grade | H-3 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Kowalski (~0.92 confidence) and mother Mary Kowalski (~0.92 confidence) and mother Mary Kowalski (~0.92 confidence) and mother Pauline Kowalski (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Kowalski
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Mary Kowalski
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Kowalski
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Pauline Kowalski
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Kowalski
Son · 1940 · age 26 · b. ~1914 · New Jersey
★ You are viewing this record
Sibling
Mary Kowalski
Sibling · 1940 · age 33
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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02434-00532)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pauline Kowalski | 57 | Head | — | Poland |
| 42 | Mary Kowalski | 33 | Daughter | Presser | Poland |
| 43 | Frank Kowalski THIS PERSON | 26 | Son | Die-Setter | New Jersey |
| 44 | Walter Czasik | 33 | Head | Wire-Weighter | New Jersey |
| 45 | Stella Czasik | 34 | Wife | — | New Jersey |
| 46 | Alexander Rickleski | 55 | Head | Rubber-Worker | Austria |
| 47 | Mary Rickleski | 46 | Wife | Hair-Dresser | Austria |
| 48 | Joseph Rickleski | 24 | Son | — | New Jersey |
| 49 | Louis Rickleski | 20 | Son | Rubber Worker | New Jersey |
| 50 | Martha Keltman | 80 | Mother-in-law | — | Austria |
| 51 | Harry Birbari | 40 | Head | Drill Press-Operator | Austria |
| 52 | Pauline Birbari | 40 | Wife | — | Austria |
| 53 | John Birbari | 18 | Son | — | New Jersey |
| 54 | Carl Churner | 31 | Head | Millman | Penna |
| 55 | Stella Churner | 28 | Wife | — | New Jersey |
| 56 | Theresa Churner | 7 | Daughter | — | New Jersey |
| 57 | Charles Churner | 3 | Son | — | New Jersey |
| 58 | Joseph Cebrowski | 23 | Brother-in-law | Polisher | New Jersey |
| 59 | John Chirik | 37 | Head | Rubber-Worker | New Jersey |
| 60 | Mary Chirik | 26 | Wife | — | Penna |
| 61 | Dorothy Chirik | 7 | Daughter | — | Penna |
| 62 | Joan Chirik | 5 | Daughter | — | New Jersey |
| 63 | Mary Chirik | 3 | Daughter | — | New Jersey |
| 64 | Adolph Astringa | 22 | Brother-in-law | Handy-Man | Penna |
| 65 | Veronica Pruhtyka | 52 | Head | — | Austria |
| 66 | John Memchik | 29 | Son-in-law | Inspector | Penna |
| 67 | Julia Memchik | 25 | Daughter | — | New Jersey |
| 68 | Peter Dechan | 72 | Head | — | New Jersey |
| 69 | Julia Dechan | 65 | Wife | — | New Jersey |
| 70 | Timothy Lynch | 73 | Head | — | New Jersey |
| 71 | Elizabeth Lynch | 66 | Wife | — | New Jersey |
| 72 | Rudolph Ruduski | 57 | Head | — | Poland |
| 73 | Agnes Ruduski | 56 | Wife | — | Poland |
| 74 | Chester Ruduski | 28 | Son | Handy-Man | New Jersey |
| 75 | Daniel Shumski | 51 | Head | Saloon-Keeper | Austria |
| 76 | Nellie Shumski | 49 | Wife | — | Austria |
| 77 | Stephen Shumski | 25 | Son | Polisher | New Jersey |
| 78 | Margaret James | 29 | Head | — | Penna |
| 79 | Ida James | 16 | Daughter | — | New Jersey |
| 80 | Robert James | 11 | Son | — | New Jersey |
Pedigree Summary
Frank + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)