JK
Joseph Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Joseph Kowalski across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hamtramck City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Hamtramck City |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Kowalski | Son | — | 15 | ~1925 |
| John Kowalski | Son | — | 21 | ~1919 |
| Jerome Kowalski | Son | — | 11 | ~1929 |
| Frances Kowalski | Spouse | — | 52 | ~1888 |
| Stanley Kowalski | Son | — | 20 | ~1920 |
| Helen Kowalski | Daughter | — | 5 | ~1935 |
| Edmund Kowalski | Son | — | 25 | ~1915 |
| Constantine Kowalski | Head | — | 52 | ~1888 |
Census Appearances
1930
Wayne, Michigan
Son, age 4
Wayne, Michigan · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Son, age 15
Wayne-County, Michigan · implied b. ~1925 — 8 household members
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hamtramck City |
| 1935 Residence (County) | Wayne |
| Industry | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Joseph Kowalski across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Kowalski
Son · 1940 · age 15 · b. ~1925 · Michigan
★ You are viewing this record
Sibling
Jerome Kowalski
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edmund Kowalski
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kowalski
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Kowalski
Sibling · 1940 · age 20
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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01830-00957)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Lopalec | 69 | Head | — | Poland |
| 2 | Agnes Lopalec | 56 | Wife | — | Poland |
| 3 | John Jr. Lopalec | 26 | Son | Laborer | Michigan |
| 4 | Stanley Siddick | 40 | Head | Laborer | Poland |
| 5 | Lillian Siddick | 39 | Wife | — | Poland |
| 6 | Frances Siddick | 10 | Daughter | — | Michigan |
| 7 | Dorothy Siddick | 10 | Daughter | — | Michigan |
| 8 | Carl Siddick | 1 | Son | — | Michigan |
| 9 | Walter Buckley | 38 | Head | Laborer | Poland |
| 10 | Nora Buckley | 35 | Wife | — | Poland |
| 11 | Harry Buckley | 16 | Son | — | Pennsylvania |
| 12 | Thomas Buckley | 10 | Son | — | Pennsylvania |
| 13 | Constantine Kowalski | 52 | Head | Laborer | Poland |
| 14 | Frances Kowalski | 52 | Wife | — | Poland |
| 15 | Edmund Kowalski | 25 | Son | — | Michigan |
| 16 | John Kowalski | 21 | Son | Helper | Michigan |
| 17 | Stanley Kowalski | 20 | Son | Laborer | Michigan |
| 18 | Joseph Kowalski THIS PERSON | 15 | Son | — | Michigan |
| 19 | Jerome Kowalski | 11 | Son | — | Michigan |
| 20 | Helen Kowalski | 5 | Daughter | — | Michigan |
| 21 | Frank Marcinkowski | 47 | Head | Laborer | Poland |
| 22 | Stella Marcinkowski | 39 | Wife | — | Poland |
| 23 | Hedwig Marcinkowski | 17 | Daughter | — | Pennsylvania |
| 24 | Henry Marcinkowski | 12 | Son | — | Michigan |
| 25 | Sophia Marcinkowski | 9 | Daughter | — | Michigan |
| 26 | Walter Starinski | 38 | Head | Laborer | Michigan |
| 27 | Cecilia Starinski | 33 | Wife | — | Minnesota |
| 28 | Margaret Starinski | 12 | Daughter | — | Michigan |
| 29 | Theresa Starinski | 10 | Daughter | — | Michigan |
| 30 | Leonard Starinski | 8 | Son | — | Michigan |
| 31 | Walter Starinski | 5 | Son | — | Michigan |
| 32 | John Starinski | 2 | Son | — | Michigan |
| 33 | Stanley Starinski | 1 | Son | — | Michigan |
| 34 | Frank Lopanek | 36 | Head | Laborer | Pennsylvania |
| 35 | Frances Lopanek | 32 | Wife | — | Pennsylvania |
| 36 | Albin Szczesniak | 22 | Head | Laborer | Michigan |
| 37 | Alice Szczesniak | 50 | Mother | — | Poland |
| 38 | Stella Szczesniak | 20 | Sister | Laborer | Michigan |
| 39 | Walter Dzialankiewicz | 25 | Lodger | Press Operator | Pennsylvania |
| 40 | Raymond Dzialankiewicz | 28 | Lodger | — | Michigan |
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)