FK
Frank Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Racine, Wisconsin
Our Model Tree links this Frank Kowalski across the 1930 and 1940 US Censuses in Racine, Wisconsin (XGBoost, ~Confirmed) — first a son (b.~1911), then head of a 10-person household.
Age 19
b. ~1911
Male
Son
Born: Wisconsin
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Racine, Wisconsin |
| Surname | Kowalski |
| Given Name | Frank S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Poland |
| Mother's Birthplace | Lithuania |
| Additional Details | |
| Occupation | Labour |
| Industry | Foundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Labour |
| Township / Ward | Caledonia Twp |
| Est. Birth Year | ~1911 |
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 1930 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Frances Kowalski | Other | — | 43 | ~1887 |
| Alex Kowalski | Son | — | 14 | ~1916 |
| Ida Tickler | Other | — | 55 | ~1875 |
| Martin Kowalski | Head | — | 43 | ~1887 |
| Stanley Kowalski | Son | — | 11 | ~1919 |
| John Kowalski | Son | — | 21 | ~1909 |
| Martin Kowalski | Son | — | 15 | ~1915 |
| Walter Kowalski | Son | — | 12 | ~1918 |
| Frank Kowalski | Son | — | 19 | ~1911 |
| Joseph Kowalski | Son | — | 18 | ~1912 |
Census Appearances
1930
Racine, Wisconsin
Son, age 19
Racine, Wisconsin · implied b. ~1911 — 10 household members
| Surname | Kowalski |
| Given Name | Frank S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Poland |
| Mother's Birthplace | Lithuania |
| Occupation | Labour |
| Industry | Foundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Racine-County, Wisconsin
Head, age 29
Racine-County, Wisconsin · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalsky |
| Given Name | Frank A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | RACINE CITY |
| 1935 Residence (County) | RACINE |
| Occupation | Moulder |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 1000 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 · 1930 · age 19 · b. ~1911 · Wisconsin
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Sibling
Stanley Kowalski
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Kowalski
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kowalski
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin Kowalski
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alex Kowalski
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1930 · age 21
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
1930 US Federal Census — Racine, Wisconsin
Open full size
1930 US Federal Census — Racine, Wisconsin
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2606unit:0940)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hattie Kruper | 38 | Wife-H | — | Holland |
| 2 | Frank Kruper | 12 | Son | — | Wisconsin |
| 3 | Anna Kruper | 10 | Daughter | — | Iowa |
| 4 | Adriana Kruper | 8 | Daughter | — | Wisconsin |
| 5 | Nancy Kruper | 5 | Son | — | Wisconsin |
| 6 | Soren L. Hansen | 28 | Head | Farmer | Denmark |
| 7 | Mary K. Hansen | 28 | Wife-H | — | Denmark |
| 8 | William M. Hansen | 2 | Daughter | — | Wisconsin |
| 9 | Charles Mann | 64 | Head | Farmer | Wisconsin |
| 10 | Mattie L. Mann | 60 | Wife-H | — | Wisconsin |
| 11 | Charles L. Tobias | 42 | Head | Machinist | Wisconsin |
| 12 | Alma E. Tobias | 18 | Daughter-H | — | Wisconsin |
| 13 | Charles Jr. Tobias | 16 | Son | — | Wisconsin |
| 14 | Marvin R. Tobias | 8 | Son | — | Wisconsin |
| 15 | Frank Raleski | 71 | Father-in-law | — | Lithuania |
| 16 | Martin Kowalski | 43 | Head | Labour | Poland |
| 17 | Frances Kowalski | 43 | Wife-H | — | Lithuania |
| 18 | John J. Kowalski | 21 | Son | Labour | Wisconsin |
| 19 | Frank S. Kowalski THIS PERSON | 19 | Son | Labour | Wisconsin |
| 20 | Joseph C. Kowalski | 18 | Son | Farmer | Wisconsin |
| 21 | Martin A. Kowalski | 15 | Son | — | Wisconsin |
| 22 | Alex Kowalski | 14 | Son | — | Wisconsin |
| 23 | Walter Kowalski | 12 | Son | — | Wisconsin |
| 24 | Stanley Kowalski | 11 | Son | — | Wisconsin |
| 25 | Ida Tickler | 55 | Lodger | — | Canada |
| 26 | James H. Hansen | 26 | Head | Carpenter | Wisconsin |
| 27 | Leslie Hansen | 36 | Wife-H | — | Wisconsin |
| 28 | Roy Genesta | 35 | Head | Farmer | Wisconsin |
| 29 | Florence B. Genesta | 31 | Wife-H | — | Wisconsin |
| 30 | Eugene H. Genesta | 7 | Son | — | Wisconsin |
| 31 | Allan R. Genesta | 3 | Son | — | Wisconsin |
| 32 | Dorothy L. Genesta | 2 | Daughter | — | Wisconsin |
| 33 | William Brown | 79 | Head | — | Germany |
| 34 | Amanda Brown | 55 | Daughter | — | Germany |
| 35 | Elmer L. Brown | 20 | Son | Farmer | Wisconsin |
| 36 | William E. Brach | 59 | Head | Inspector | Wisconsin |
| 37 | Rose L. Brach | 59 | Wife-H | — | Wisconsin |
| 38 | James C. Brach | 32 | Son | Farmer | Wisconsin |
| 39 | Lorence R. Brach | 26 | Daughter | — | Wisconsin |
| 40 | Andrew Hansen | 69 | Boarder | — | Denmark |
| 41 | Mina Hopkins | 60 | Servant | Housekeeper | Missouri |
| 42 | Frank Potsch | 59 | Head | Farmer | Wisconsin |
| 43 | Lucy Potsch | 55 | Wife-H | — | Wisconsin |
| 44 | Edwin Potsch | 24 | Son | Salesman | Wisconsin |
| 45 | Lawrence Potsch | 22 | Son | Salesman | Wisconsin |
| 46 | Theodore B. Meyer | 42 | Head | Farmer | Wisconsin |
| 47 | Anna S. Meyer | 39 | Wife-H | — | Wisconsin |
| 48 | Wilbur Meyer | 9 | Son | — | Wisconsin |
| 49 | Raymond Meyer | 7 | Son | — | Wisconsin |
| 50 | Ruth Meyer | 3 | Daughter | — | Wisconsin |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)