JK
John Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Kowalski across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents John & Ignacy — first a head (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Kowalski |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bayonne |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Salesman |
| Industry | Tobacco company |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 278 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Salesman |
| Township / Ward | Bayonne |
| Est. Birth Year | ~1913 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Kowalski | Head | — | 27 | ~1913 |
| John Kowalski | Son | — | ~1940 | |
| Jessie Kowalski | Spouse | — | 19 | ~1921 |
Census Appearances
1920
Hudson, New …
Son, age 7
Hudson, New Jersey · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 18
Hudson, New Jersey · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Salesman |
| Industry | Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Head, age 27
Hudson-County, New Jersey · implied b. ~1913 — 3 household members
| Surname | Kowalski |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Bayonne |
| 1935 Residence (County) | Hudson |
| Occupation | Salesman |
| Industry | Tobacco company |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 278 |
| 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 John Kowalski across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Kowalski (~0.92 confidence) and father Ignacy Kowalski (~0.92 confidence) and mother Mary Kowalski (~0.92 confidence) and mother Helen Kowalski (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Kowalski
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Ignacy Kowalski
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Mary Kowalski
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Helen Kowalski
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Kowalski
Head · 1940 · age 27 · b. ~1913 · New Jersey
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02347-00038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sophie V. Glover | 34 | Daughter | Housekeeper | New Jersey |
| 42 | Dorothy Glover | 15 | Daughter | — | New Jersey |
| 43 | Geraldine Glover | 6 | Daughter | — | New Jersey |
| 44 | James Pruytzka|Pruytzha | 46 | Head | Laborer | Russia |
| 45 | Mary Pruytzka|Pruytzha | 56 | Wife | Laborer | Russia |
| 46 | Stanley Pilkiewicz | 55 | Head | Laborer | Poland |
| 47 | Frances Pilkiewicz | 49 | Wife | — | Poland |
| 48 | Joseph Pilkiewicz | 28 | Son | Laborer | New Jersey |
| 49 | Raymond Pilkiewicz | 25 | Son | Helper | Pennsylvania |
| 50 | Henry Pilkiewicz | 21 | Son | Painter | Pennsylvania |
| 51 | Eleanor Pilkiewicz | 18 | Daughter | — | Pennsylvania |
| 52 | Katherine Pilkiewicz | 15 | Daughter | — | Pennsylvania |
| 53 | Anna Pilkiewicz | 11 | Daughter | — | New Jersey |
| 54 | Charles A. Waleski | 27 | Head | Truck Driver | New Jersey |
| 55 | Anna H. Waleski | 26 | Wife | — | New Jersey |
| 56 | Janet A. Waleski | 5 | Daughter | — | New Jersey |
| 57 | Charles W. Waleski | 1 | Son | — | New Jersey |
| 58 | Mary Gedesky | 50 | Head | — | Poland |
| 59 | Bernard A. Gedesky | 22 | Son | Machinist | New Jersey |
| 60 | Joseph A. Gedesky | 20 | Son | Presser | New Jersey |
| 61 | Louise C. Gedesky | 18 | Daughter | Machinist | New Jersey |
| 62 | Mary G. Gedesky | 17 | Daughter | Homework | New Jersey |
| 63 | Alfred J. Gedesky | 16 | Son | — | New Jersey |
| 64 | Stanley F. Gedesky | 13 | Son | — | New Jersey |
| 65 | Fred C. Gedesky | 11 | Son | — | New Jersey |
| 66 | Alexander Kurry | 34 | Head | Truck Driver | California |
| 67 | Alice M. Kurry | 27 | Wife | — | Pennsylvania |
| 68 | Alice M. Kurry | 11 | Daughter | — | New Jersey |
| 69 | Alexander Jr. Kurry | 10 | Son | — | New Jersey |
| 70 | Robert J. Kurry | 6 | Son | — | New Jersey |
| 71 | Joseph P. Kurry | 4 | Son | — | New Jersey |
| 72 | Robert T. Dischler | 21 | Brother-in-law | New Worker | Pennsylvania |
| 73 | Mathew L. Derosis | 37 | Head | — | Pennsylvania |
| 74 | Martha Derosis | 30 | Wife | — | New Jersey |
| 75 | Susie Coleman | 65 | Mother-in-law | — | Maryland |
| 76 | John M. Kowalski THIS PERSON | 27 | Head | Salesman | New Jersey |
| 77 | Jessie F. Kowalski | 19 | Wife | — | Pennsylvania |
| 78 | John M. Jr. Kowalski | 0 | Son | — | New Jersey |
| 79 | Daniel Kohn | 42 | Head | Salesman | New Jersey |
Pedigree Summary
John
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)