FK
Frank Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Northumberland-County, Pennsylvania
Our Model Tree links this Frank Kowalski across the 1910, 1920, 1930 and 1940 US Censuses in Northumberland-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Peter & Peter — first a head (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Northumberland-County, Pennsylvania |
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coal Township |
| 1935 Residence (County) | Northumberland |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public school |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1400 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Teacher |
| Township / Ward | Coal Township |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| Frances Kowalski | Daughter | — | 5 | ~1935 |
| Janet Kowalski | Spouse | — | 28 | ~1912 |
| Frank Kowalski | Head | — | 32 | ~1908 |
Census Appearances
1910
Northumberland, Pennsylvania
Son, age 3
Northumberland, Pennsylvania · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalskie |
| Given Name | Francis R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Northumberland, Pennsylvania
Son, age 13
Northumberland, Pennsylvania · implied b. ~1907 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Francis L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Northumberland, Pennsylvania
Son, age 23
Northumberland, Pennsylvania · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Francis |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | School Teacher |
| Industry | Public Schools |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Northumberland-County, Pennsylvania
Head, age 32
Northumberland-County, Pennsylvania · implied b. ~1908 — 3 household members
| Surname | Kowalski |
| Given Name | Frank |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coal Township |
| 1935 Residence (County) | Northumberland |
| Occupation | Teacher |
| Industry | Public school |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1400 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Kowalski (~0.92 confidence) and father Peter Kowalskie (~0.92 confidence) and mother Clara Kowalski (~0.92 confidence) and mother Leona Kowalskie (~0.92 confidence) and mother Leona Kowalski (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Kowalski
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Peter Kowalskie
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Clara Kowalski
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Leona Kowalskie
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Leona Kowalski
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Frank Kowalski
Head · 1940 · age 32 · b. ~1908 · 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 — Northumberland-County, Pennsylvania
Open full size
1940 US Federal Census — Northumberland-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03595-00281)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine Mae Warner | 12 | daughter | — | Pennsylvania |
| 42 | Jack Warner | 27 | Head | Miner | Pennsylvania |
| 43 | Edith Warner | 26 | Wife | — | Pennsylvania |
| 44 | Herbert Cawthern | 50 | Head | Mason | Pennsylvania |
| 45 | Tessa Cawthern | 51 | Wife | — | Pennsylvania |
| 46 | Anna Louise Cawthern | 17 | Daughter | — | Pennsylvania |
| 47 | Frank Kowalski THIS PERSON | 32 | Head | Teacher | Pennsylvania |
| 48 | Janet Kowalski | 28 | Wife | — | Pennsylvania |
| 49 | Frances Kowalski | 5 | Daughter | — | Pennsylvania |
| 50 | Clarence Adams | 39 | Head | Driver | Ohio |
| 51 | Ethel Adams | 37 | Wife | — | Pennsylvania |
| 52 | Charles Adams | 15 | Son | — | Pennsylvania |
| 53 | Edward Rakochie | 27 | Head | Meat-Cutter | Pennsylvania |
| 54 | Mary Rakochie | 25 | Wife | — | Pennsylvania |
| 55 | Rose Marie Rakochie | 7 | Daughter | — | Pennsylvania |
| 56 | Joseph Rakochie | 40 | Head | Miner | Pennsylvania |
| 57 | Mae Rakochie | 34 | Wife | — | Pennsylvania |
| 58 | Joseph Jr. Rakochie | 16 | Son | Errand-Deliver | Pennsylvania |
| 59 | Margaret Rakochie | 10 | Daughter | — | Pennsylvania |
| 60 | Shirley Rakochie | 4 | Daughter | — | Pennsylvania |
| 61 | Harold Walker | 42 | Head | Floor-Man | Pennsylvania |
| 62 | Catherine Walker | 44 | Wife | — | Pennsylvania |
| 63 | Catherine Walker | 6 | Daughter | — | Pennsylvania |
| 64 | William Deibler | 41 | Head | Clerk | Pennsylvania |
| 65 | Jean B. Deibler | 39 | Wife | — | New Jersey |
| 66 | John Deibler | 16 | Son | — | Pennsylvania |
| 67 | William Deibler | 15 | Son | — | Pennsylvania |
| 68 | Margaret Deibler | 11 | Daughter | — | Pennsylvania |
| 69 | Jean Isabel Deibler | 8 | Daughter | — | Pennsylvania |
| 70 | Janet Deibler | 2 | Daughter | — | Pennsylvania |
| 71 | Marilyn Deibler | 0 | Daughter | — | Pennsylvania |
| 72 | Mildred Deibler | 0 | Daughter | — | Pennsylvania |
| 73 | Frank X. Hanley | 47 | Head | Salesman | Pennsylvania |
| 74 | Helen Hanley | 40 | Wife | — | Pennsylvania |
| 75 | John Hanley | 15 | Son | — | Pennsylvania |
| 76 | Francis Hanley | 10 | Son | — | Pennsylvania |
| 77 | Elizabeth Ann Hanley | 5 | Daughter | — | Pennsylvania |
| 78 | Rachael Fisher | 74 | Head | — | Pennsylvania |
| 79 | Paul Fisher | 52 | Son | Collector | Pennsylvania |
| 80 | Marian Fisher | 45 | Daughter-in-law | — | Pennsylvania |
Pedigree Summary
Frank
Gen 1 · 5 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)