FK
Frank Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Frank Kowalski across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Joseph & Stanley — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Braddock Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | molder |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 338 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Molder |
| Township / Ward | Braddock Boro |
| Est. Birth Year | ~1916 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Frank | Age | Birth yr |
|---|---|---|---|---|
| Ruth Kowalski | Spouse | — | 23 | ~1917 |
| Frank Kowalski | Head | — | 24 | ~1916 |
| Dorothy Kowalski | Daughter | — | 2 | ~1938 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 2
Allegheny, Pennsylvania · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalska |
| Given Name | Frank |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 24
Allegheny-County, Pennsylvania · implied b. ~1916 — 3 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Braddock Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | molder |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 338 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Joseph Kowalski (~0.92 confidence) and father Stanley Kowalska (~0.92 confidence) and mother Stella Kowalski (~0.92 confidence) and mother Wladyslawa Kowalska (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Kowalski
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Stanley Kowalska
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Stella Kowalski
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Wladyslawa Kowalska
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Kowalski
Head · 1940 · age 24 · b. ~1916 · Pennsylvania
★ 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03398-00621)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hyman Podolsky | 62 | Head | Merchant | Russia |
| 2 | Anna Podolsky | 58 | Wife | Helps Husband | Russia |
| 3 | Milton Podolsky | 22 | Son | Clerk | Pennsylvania |
| 4 | Norman Podolsky | 20 | Son | Clerk | Pennsylvania |
| 5 | Anthony Thomas | 74 | Head | — | Eire |
| 6 | William Thomas | 41 | Son | Labourer | Pennsylvania |
| 7 | Francis Thomas | 38 | Son | Labourer | Pennsylvania |
| 8 | Iona Painter | 43 | Head | — | West Virginia |
| 9 | Peter Jas. Painter | 36 | Head | Boat (Oiler) | Ohio |
| 10 | Ruth Painter | 24 | Wife | — | Pennsylvania |
| 11 | Janet Painter | 5 | Daughter | — | Pennsylvania |
| 12 | Frank Painter | 3 | Son | — | West Virginia |
| 13 | Frank Kranak | 33 | Head | Rigger | Pennsylvania |
| 14 | Margaret Kranak | 35 | Wife | — | Pennsylvania |
| 15 | Peter Kolarczyk | 67 | Head | Laborer | Poland |
| 16 | Anna Kolarczyk | 66 | Wife | — | Poland |
| 17 | Stanley Kolarczyk | 25 | Son | Laborer | Pennsylvania |
| 18 | Albert M. Parlak | 42 | Head | Investigator | Pennsylvania |
| 19 | Susanna Parlak | 41 | Wife | Nurse (R.N.) | Pennsylvania |
| 20 | Albert Jr. Parlak | 17 | Son | — | Pennsylvania |
| 21 | Rose Mary Parlak | 11 | Daughter | — | Pennsylvania |
| 22 | Michael Parlak | 76 | Father | — | Austria Hungary |
| 23 | Michael Jas. Kmety | 57 | Roomer | Stone Setter | Czechoslovakia |
| 24 | Frank Kowalski THIS PERSON | 24 | Head | Molder | Pennsylvania |
| 25 | Ruth Kowalski | 23 | Wife | — | Pennsylvania |
| 26 | Dorothy Kowalski | 2 | Daughter | — | Pennsylvania |
| 27 | John Pahank | 34 | Head | Laborer | Pennsylvania |
| 28 | Sophia Pahank | 28 | Wife | — | Pennsylvania |
| 29 | John Jr. Pahank | 2 | Son | — | Pennsylvania |
| 30 | Michael Malahun | 71 | Head | Merchant | Austria Hungary |
| 31 | Mary Malahun | 61 | Wife | — | Austria Hungary |
| 32 | Donald Malahun | 16 | Son | — | Pennsylvania |
| 33 | Vincent Buttner | 34 | Head | Manager (Branch) | Pennsylvania |
| 34 | Marion Buttner | 35 | Wife | — | Pennsylvania |
| 35 | Joan Lee Buttner | 9 | Daughter | — | Pennsylvania |
| 36 | Roger Buttner | 6 | Son | — | Pennsylvania |
| 37 | Joseph Zombek | 50 | Brother | Clerk | Pennsylvania |
| 38 | Hattie Zombek | 39 | Roomer | Investigator | Pennsylvania |
| 39 | Philip Cacher | 27 | Head | Polisher | Pennsylvania |
| 40 | Rose Cacher | 24 | Wife | — | Pennsylvania |
Pedigree Summary
Frank
Gen 1 · 4 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)