FK
Frank Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Frank Kowalski across the 1920, 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed), with identified parents Vincent & Celia — first a head (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Head
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Occupation | Die maker |
| Industry | Auto industry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Die Maker |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1900 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Dolores Kowalski | Daughter | — | 16 | ~1924 |
| Robert Kowalski | Son | — | 15 | ~1925 |
| Frank Kowalski | Head | — | 40 | ~1900 |
| Marie Kowalski | Spouse | — | 37 | ~1903 |
Census Appearances
1920
Wayne, Michigan
Son, age 19
Wayne, Michigan · implied b. ~1901 — 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 | 19 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Wayne, Michigan
Head, age 29
Wayne, Michigan · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 22 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Germany |
| Occupation | Die maker |
| Industry | auto parts factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Head, age 40
Wayne-County, Michigan · implied b. ~1900 — 4 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Occupation | Die maker |
| Industry | Auto industry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | Hs 4 |
| 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 Frank Kowalski across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Vincent Kowalski (~0.92 confidence) and mother Celia Kowalski (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Vincent Kowalski
b. ~1853
Source father
● Household
· direct · ~0.92
Mother
Celia Kowalski
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Kowalski
Head · 1940 · age 40 · b. ~1900 · Michigan
★ 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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
34 people indexed on this census page (nara:1940:m-t0627-01889-00528)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Frank Kowalski THIS PERSON | 40 | Head | Die Maker | Michigan |
| 3 | Marie C Kowalski | 37 | Wife | — | Michigan |
| 4 | Dolores J Kowalski | 16 | Daughter | — | Michigan |
| 5 | Robert J Kowalski | 15 | Son | — | Michigan |
| 7 | Charles M Cook | 25 | Head | Accountant | Michigan |
| 8 | Jean A Cook | 24 | Wife | — | Canada English |
| 9 | John M Gourgeon | 37 | Head | Manager | Ohio |
| 10 | Dorothy M Gourgeon | 37 | Wife | — | Ohio |
| 11 | Thomas J Gourgeon | 4 | Son | — | Michigan |
| 13 | Isadore Levitt | 52 | Head | Contracting Electrician | Russia |
| 14 | Bella X Levitt | 52 | Wife | — | Russia |
| 15 | Arthur S Levitt | 22 | Son | Contracting Electrician | Michigan |
| 16 | Ruth Levitt | 21 | Daughter | — | Michigan |
| 17 | Laura S Levitt | 14 | Daughter | — | Michigan |
| 18 | Lillie Ferguson | 37 | Servant | Clerk | South Carolina |
| 19 | Cecil D Nicholls | 37 | Head | Clerical | Canada English |
| 20 | Margaret Nicholls | 34 | Wife | Clerical | Scotland |
| 21 | John W Hofstetter | 32 | Head | Policeman | New York |
| 22 | Juanita A Hofstetter | 34 | Wife | — | Michigan |
| 23 | John W Hofstetter | 8 | Son | — | Michigan |
| 24 | Barbara A Hofstetter | 1 | Daughter | — | Michigan |
| 25 | Casian A Linderoos | 46 | Head | Superintendent | Sweden |
| 26 | Evelyn M Linderoos | 42 | Wife | — | Pennsylvania |
| 27 | Catherine Warner | 65 | Mother-in-law | — | Pennsylvania |
| 28 | Ralph Johnson | 27 | Head | Building Supervisor | California |
| 29 | Vesta B Johnson | 31 | Wife | Consumer Counselor | Michigan |
| 31 | Russell H Swift | 28 | Head | Fireman | Michigan |
| 32 | Mary J Swift | 24 | Wife | — | Michigan |
| 33 | Anthony H Lavers | 43 | Head | Clerk | Michigan |
| 34 | Lillian M Lavers | 41 | Wife | — | Michigan |
| 36 | Claude J Bentley | 38 | Head | Roofing Representative | Michigan |
| 37 | Inez J Bentley | 37 | Wife | Cashier | Michigan |
| 39 | Joe (X) Panackia | 46 | Head | Contractor | Italy |
| 40 | Vina Panackia | 43 | Wife | — | Canada French |
Pedigree Summary
Frank
Gen 1 · 2 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)