FK
Frank Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Frank Kowalski across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Kowalski |
| Given Name | Frank Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Wayne |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Highest Grade | Hs 6 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Est. Birth Year | ~1926 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Jane Kowalski | Daughter | — | 1 | ~1939 |
| Frank Kowalski | Son | — | 14 | ~1926 |
| Doris Kowalski | Daughter | — | 4 | ~1936 |
| Hattie Kowalski | Spouse | — | 35 | ~1905 |
| Elaine Kowalski | Daughter | — | 9 | ~1931 |
| Richard Kowalski | Son | — | 6 | ~1934 |
| Donald Kowalski | Son | — | 13 | ~1927 |
| Gerald Kowalski | Son | — | 8 | ~1932 |
| Lawrence Kowalski | Son | — | 11 | ~1929 |
| Frank Kowalski | Head | — | 42 | ~1898 |
Census Appearances
1930
Wayne, Michigan
Son, age 4
Wayne, Michigan · implied b. ~1926 — 7 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 | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Son, age 14
Wayne-County, Michigan · implied b. ~1926 — 10 household members
| Surname | Kowalski |
| Given Name | Frank Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Wayne |
| 1935 Residence (County) | Wayne |
| Highest Grade | Hs 6 |
| 1935 Residence | Same House |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Frank Kowalski
Son · 1940 · age 14 · b. ~1926 · Michigan
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Sibling
Gerald Kowalski
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Kowalski
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Kowalski
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Kowalski
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Kowalski
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Kowalski
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Kowalski
Sibling · 1940 · age 6
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-t0627-01863-00433)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Leo Thomas | 26 | Son | Laborer | Michigan |
| 42 | Leona Thomas | 20 | Daughter | — | Michigan |
| 43 | Aaron D. Driebe | 35 | Head | Lawyer | Michigan |
| 44 | Mae Driebe | 35 | Wife | — | Michigan |
| 45 | Patrick Driebe | 6 | Son | — | Michigan |
| 46 | John Driebe | 4 | Son | — | Michigan |
| 47 | Charles W. Beggy | 56 | Head | Inspector | Illinois |
| 48 | Leona D. Beggy | 52 | Wife | — | Ohio |
| 49 | Walter F. Nagel | 24 | Son-in-law | Staffer | Ohio |
| 50 | Bernice Nagel | 25 | Daughter | — | Iowa |
| 51 | Beverly Ann Nagel | 3 | Grand-daughter | — | Michigan |
| 52 | Flora R. Springer | 50 | Head | — | Poland |
| 53 | William Springer | 31 | Son | Truck Driver | Pennsylvania |
| 54 | Walter Springer | 25 | Son | Bus Boy | Pennsylvania |
| 55 | Max Courter | 27 | Head | Wrapper | Michigan |
| 56 | Dorothy R. Courter | 24 | Wife | — | Michigan |
| 57 | Joseph Courter | 5 | Son | — | Michigan |
| 58 | Madeline Courter | 3 | Daughter | — | Michigan |
| 59 | Annette Courter | 1 | Daughter | — | Michigan |
| 60 | Guy Courter | 31 | Brother | Gas Attendant | Michigan |
| 61 | George Cobb | 22 | Lodger | Truck Driver | Michigan |
| 62 | Emma K. Thompson | 44 | Head | — | Michigan |
| 63 | Robert Thompson | 14 | Son | Checker | Michigan |
| 64 | Carl Vandoola | 25 | Head | Laborer | Canada |
| 65 | Dorothy R. Vandoola | 25 | Wife | — | Michigan |
| 66 | Donald Vandoola | 4 | Son | — | Michigan |
| 67 | Patricia Ann Vandoola | 2 | Daughter | — | Michigan |
| 68 | Arlene J. Vandoola | 1 | Daughter | — | Michigan |
| 69 | Frank Kowalski | 42 | Head | Laborer | Michigan |
| 70 | Hattie Kowalski | 35 | Wife | — | Michigan |
| 71 | Frank Jr. Kowalski THIS PERSON | 14 | Son | — | Michigan |
| 72 | Donald Kowalski | 13 | Son | — | Michigan |
| 73 | Lawrence Kowalski | 11 | Son | — | Michigan |
| 74 | Elaine Kowalski | 9 | Daughter | — | Michigan |
| 75 | Gerald Kowalski | 8 | Son | — | Michigan |
| 76 | Richard Kowalski | 6 | Son | — | Michigan |
| 77 | Doris Kowalski | 4 | Daughter | — | Michigan |
| 78 | Jane Kowalski | 1 | Daughter | — | Michigan |
| 79 | Bernard Kenny | 31 | Head | Mail Trucker | Canada |
| 80 | Beatrice X. Kenny | 21 | Wife | — | Canada |
Related Census Records
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)