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 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 8-person household.
Age 8
b. ~1922
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1922 |
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 1930 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Joseph Kowalski | Son | — | 6 | ~1924 |
| Sophie Kowalski | Daughter | — | 11 | ~1919 |
| Josephine Kowalski | Daughter | — | 10 | ~1920 |
| John Kowalski | Son | — | 1 | ~1929 |
| Frank Kowalski | Daughter | — | 8 | ~1922 |
| Tony Kowalski | Head | — | 30 | ~1900 |
| Constance Kowalski | Spouse | — | 28 | ~1902 |
| Edward Kowalski | Son | — | 3 | ~1927 |
Census Appearances
1930
Cook, Illinois
Daughter, age 8
Cook, Illinois · implied b. ~1922 — 8 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 19
Cook-County, Illinois · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frances |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Folder |
| Industry | West Wood Ldy |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 480 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Frank Kowalski
Daughter · 1930 · age 8 · b. ~1922 · Illinois
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Sibling
Joseph Kowalski
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Kowalski
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Kowalski
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sophie Kowalski
Sibling · 1930 · age 11
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 — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel436:0911)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Francis Tarabasz | 48 | Head | Clergyman | Poland |
| 2 | Lad. Balcer | 27 | Assistant | Clergyman | Illinois |
| 3 | Francis Gajewski | 28 | Assistant | Clergyman | Poland |
| 4 | Frances Goniec | 41 | Housekeeper | Servant | Poland |
| 5 | Anton Rozanski | 42 | Head | Cashier | Poland |
| 6 | Wladislava Rozanski | 40 | Wife | Saleslady | Poland |
| 7 | Marion Rozanski | 18 | Daughter | Laborer | Poland |
| 8 | Victor Rozanski | 16 | Son | — | Illinois |
| 9 | Constantine Smolinski | 51 | Head | — | Poland |
| 10 | Katherine Smolinski | 23 | Daughter | Office Clerk | Illinois |
| 11 | George Buda | 39 | Head | Laborer | Czechoslovakia |
| 12 | Antonia Buda | 43 | Wife | — | Poland |
| 13 | Bernice Buda | 9 | Daughter | — | Illinois |
| 14 | Joseph Karpinski | 50 | Head | Laborer | Czechoslovakia |
| 15 | Frank Karpinski | 43 | Partner | — | Poland |
| 16 | John Zupanc | 36 | Partner | — | Czechoslovakia |
| 17 | Tony Kowalski | 30 | Head | Trucking | Poland |
| 18 | Constance Kowalski | 28 | Wife | — | Poland |
| 19 | Sophie Kowalski | 11 | Daughter | — | Illinois |
| 20 | Josephine Kowalski | 10 | Daughter | — | Illinois |
| 21 | Frank Kowalski THIS PERSON | 8 | Daughter | — | Illinois |
| 22 | Joseph Kowalski | 6 | Son | — | Illinois |
| 23 | Edward Kowalski | 3 | Son | — | Illinois |
| 24 | John Kowalski | 1 | Son | — | Illinois |
| 25 | Joseph Marszalek | 35 | Head | Laborer | Poland |
| 26 | Julia Marszalek | 35 | Wife | — | Poland |
| 27 | Joseph Marszalek | 12 | Son | — | Illinois |
| 28 | Rose Marie Marszalek | 2 | Daughter | — | Illinois |
| 29 | Joseph Kichura | 25 | Boarder | Plumber | Illinois |
| 30 | Wladislav Pasnia | 21 | Boarder | Laborer | Michigan |
| 31 | Walter Usani | 47 | Boarder | Laborer | Poland |
| 32 | Andrew Usani | 19 | Boarder | Laborer | Illinois |
| 33 | Rose Stepanek | 19 | Head | — | Illinois |
| 34 | Amelia Nowak | 35 | Partner | Laborer | Poland |
| 35 | Walter Janiszewski | 45 | Head | Laborer | Poland |
| 36 | Bernice Janiszewski | 20 | Daughter | — | Illinois |
| 37 | Frank Janiszewski | 17 | Son | Laborer | Illinois |
| 38 | Helen Janiszewski | 15 | Daughter | — | Illinois |
| 39 | John Janiszewski | 13 | Son | — | Illinois |
| 40 | Balzer Pretzkowski | 44 | Head | Laborer | Poland |
| 41 | Mary Pretzkowski | 44 | Wife | — | Poland |
| 42 | Emily Pretzkowski | 17 | Daughter | — | Illinois |
| 43 | John Kudek | 40 | Head | Laborer | Poland |
| 44 | Stephania Kudek | 35 | Wife | — | Poland |
| 45 | Josephine Kudek | 16 | Daughter | — | Illinois |
| 46 | Gladys Kudek | 15 | Son | — | Illinois |
| 47 | Wladislav Kudek | 10 | Son | — | Illinois |
| 48 | Marie Kudek | 6 | Daughter | — | Illinois |
| 49 | Mary Zaichak | 51 | Head | — | Poland |
| 50 | Frank Zaichak | 28 | Son | Electrician | Austria |
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)