FK
Frank Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Frank Kowalski across the 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 9-person household.
Age 46
b. ~1884
Male
Head
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5,000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1884 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Frank Kowalski | Head | — | 46 | ~1884 |
| Irene Kowalski | Daughter | — | 23 | ~1907 |
| Frank Kowalski | Son | — | 22 | ~1908 |
| Minnie Kowalski | Other | — | 44 | ~1886 |
| Stanley Kowalski | Son | — | 14 | ~1916 |
| Harold Kowalski | Son | — | 27 | ~1903 |
| Andie Kowalski | Son | — | 11 | ~1919 |
| John Kowalski | Son | — | 17 | ~1913 |
| Sarah Kowalski | Daughter | — | 6 | ~1924 |
Census Appearances
1920
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Foundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 46
Cook, Illinois · implied b. ~1884 — 9 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5,000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 (1920 and 1930) in Cook, Illinois, using XGBoost record linkage.
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This person
Anchor record
Frank Kowalski
Head · 1930 · age 46 · b. ~1884 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel487:0165)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lucille Graham | 37 | Head | Laborer | Illinois |
| 2 | Irene Graham | 11 | Daughter | — | Illinois |
| 3 | Harry Graham | 53 | Brother | — | Louisiana |
| 4 | Milton J. Ward | 75 | Head | Electrician | Kansas |
| 5 | Ad Ward | 71 | Brother | — | Michigan |
| 6 | Samuel Norman | 23 | Head | Asst Sales Manager | Missouri |
| 7 | Ida Norman | 21 | Wife-H | — | Russia |
| 8 | Irma Jean Norman | 1 | Daughter | — | Illinois |
| 9 | Otto Shutter | 23 | Head | Sales Manager | Illinois |
| 10 | Catherine Shutter | 23 | Wife-H | Secretary | Illinois |
| 11 | Arthur Moon | 34 | Head | Department Head | Wisconsin |
| 12 | Lois Moon | 34 | Wife-H | — | Wisconsin |
| 13 | William Lucas | 37 | Head | Shipping Clerk | Germany |
| 14 | Elsie Lucas | 27 | Wife-H | — | Germany |
| 15 | Betty Jane Lucas | 3 | Daughter | — | Illinois |
| 16 | Mildred Lakin | 43 | Lodger | Cook | Germany |
| 17 | Fred Launde | 54 | Head | Machinist | Germany |
| 18 | Helen Launde | 30 | Wife-H | — | Germany |
| 19 | Fred Launde | 10 | Son | — | Germany |
| 20 | Jack Clifford | 43 | Head | Tinsmith | Germany |
| 21 | Elizabeth Clifford | 39 | Wife-H | — | Germany |
| 22 | Hans Clifford | 1 | Son | — | Germany |
| 23 | Frank Kowalski THIS PERSON | 46 | Head | Laborer | Illinois |
| 24 | Minnie Kowalski | 44 | Wife-H | — | Germany |
| 25 | Harold Kowalski | 27 | Son | Shipping Clerk | Illinois |
| 26 | Irene Kowalski | 23 | Daughter | — | Illinois |
| 27 | Frank Jr. Kowalski | 22 | Son | Receiving Clerk | Illinois |
| 28 | John Kowalski | 17 | Son | Laborer | Illinois |
| 29 | Stanley Kowalski | 14 | Son | — | Illinois |
| 30 | Andie Kowalski | 11 | Son | — | Illinois |
| 31 | Sarah Kowalski | 6 | Daughter | — | Illinois |
| 32 | Ernest Rhein | 59 | Head | — | Germany |
| 33 | Goldie Rhein | 9 | Lodger | — | Illinois |
| 34 | Henry Schwaeger | 36 | Head | Chauffeur | Illinois |
| 35 | Lena Schwaeger | 35 | Wife-H | — | Illinois |
| 36 | Evelyn Schwaeger | 13 | Daughter | — | Illinois |
| 37 | Irene Schwaeger | 9 | Daughter | — | Illinois |
| 38 | Henry Jr. Schwaeger | 4 | Son | — | Illinois |
| 39 | John Peterson | 70 | Father-in-law | — | Sweden |
| 40 | William Ernst | 35 | Head | Buyer | Illinois |
| 41 | Lillian Ernst | 33 | Wife-H | — | Illinois |
| 42 | Lois Ernst | 13 | Daughter | — | Illinois |
| 43 | Carl Schmidt | 73 | Head | — | Germany |
| 44 | Bertha Schmidt | 41 | Daughter | — | Illinois |
| 45 | Margaret Schmidt | 40 | Daughter | — | Germany |
| 46 | Victor Hamburgh | 59 | Head | Mail Carrier | Pennsylvania |
| 47 | Nellie Hamburgh | 55 | Wife-H | — | Illinois |
| 48 | Lewis Hamburgh | 19 | Son | Salesman | Illinois |
| 49 | Richard Eye | 34 | Head | Interior Decorator | Michigan |
| 50 | George Warner | 25 | Lodger | — | Illinois |
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)