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John Kowalski — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this John Kowalski across the 1910 and 1920 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 9-person household.
Age 40
b. ~1880
Male
Head
Born: Poland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Poland |
| Year of Immigration | 1901 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Occupation | Laborer |
| Industry | Coal Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | R |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Occupation | Laborer |
| Township / Ward | Phila |
| Est. Birth Year | ~1880 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kowalski | Head | — | 40 | ~1880 |
| Leo Kowalski | Son | — | 5 | ~1915 |
| Regina Kowalski | Daughter | — | 2 | ~1918 |
| Frances Kowalski | Daughter | — | 7 | ~1913 |
| John Kowalski | Son | — | ~1920 | |
| Stanley Kowalski | Son | — | 11 | ~1909 |
| Jennie Kowalski | Daughter | — | 9 | ~1911 |
| Stella Kowalski | Spouse | — | 37 | ~1883 |
| Mary Kowalski | Daughter | — | 13 | ~1907 |
Census Appearances
1910
Philadelphia, Pennsylvania
Head, age 30
Philadelphia, Pennsylvania · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Poland |
| Years Married | 2 |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Sugar Refinery |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Polish |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1920
Philadelphia, Pennsylvania
Head, age 40
Philadelphia, Pennsylvania · implied b. ~1880 — 9 household members
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Poland |
| Year of Immigration | 1901 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Coal Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | R |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 John Kowalski across 2 US Census years (1910 and 1920) in Philadelphia, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
John Kowalski
Head · 1920 · age 40 · b. ~1880 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Philadelphia, Pennsylvania
Open full size
1920 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1624unit:1120)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Kozlakiewicz | 40 | Head | Laborer | Poland |
| 2 | Stella Kozlakiewicz | 38 | Wife | — | Poland |
| 3 | Mary Kozlakiewicz | 10 | Daughter | — | Penna |
| 4 | John Kozlakiewicz | 9 | Son | — | Pennsylvania |
| 5 | Anna Kozlakiewicz | 8 | Daughter | — | Pennsylvania |
| 6 | Helen Kozlakiewicz | 6 | Daughter | — | Pennsylvania |
| 7 | Stanley Szczepanski | 31 | Head | Carriage Builder | Poland |
| 8 | Laura Szczepanski | 30 | Wife | — | Poland |
| 9 | Stanley Zielinski | 36 | Brother-in-law | Laborer | Poland |
| 10 | Stanley Runowski | 43 | Head | Helper | Poland |
| 11 | Sophie Runowski | 36 | Wife | — | Poland |
| 12 | Anna Runowski | 13 | Daughter | — | Penna |
| 13 | Gertrude Runowski | 11 | Daughter | — | Pennsylvania |
| 14 | Casimer Runowski | 6 | Son | — | Pennsylvania |
| 15 | Olga Runowski | 4 | Daughter | — | Pennsylvania |
| 16 | Edward Runowski | 2 | Son | — | Pennsylvania |
| 17 | Sophie Runowski | 0 | Daughter | — | Pennsylvania |
| 18 | Henry Nuckowski | 29 | Head | Laborer | Poland |
| 19 | Josephine Nuckowski | 28 | Wife | — | Poland |
| 20 | Peter Dunasfski | 47 | Head | Laborer | Poland |
| 21 | Antonia Dunasfski | 31 | Wife | — | Poland |
| 22 | Vincent Paralich | 26 | Head | Rigger | Austria |
| 23 | Anthony Mydo | 48 | Boarder | Rigger | Austria |
| 24 | Joseph Chudziaski | 35 | Head | Laborer | Poland |
| 25 | Ludwika Chudziaski | 30 | Wife | — | Poland |
| 26 | Vincent Chudziaski | 13 | Son | — | Pennsylvania |
| 27 | Anthony Chudziaski | 11 | Son | — | Pennsylvania |
| 28 | Mary Chudziaski | 9 | Daughter | — | Pennsylvania |
| 29 | Helen Chudziaski | 7 | Daughter | — | Pennsylvania |
| 30 | Sophie Chudziaski | 5 | Daughter | — | Pennsylvania |
| 31 | Adeline Chudziaski | 2 | Daughter | — | Pennsylvania |
| 32 | Anthony Wierowska | 24 | Head | Machine Tender | Poland |
| 33 | Malgorzata Wierowska | 22 | Wife | — | Poland |
| 34 | Polona Wierowska | 2 | Daughter | — | Pennsylvania |
| 35 | Edmund Wierowska | 0 | Son | — | Pennsylvania |
| 36 | Joseph Goraich | 52 | Head | Carpenter | Austria |
| 37 | Anthony Grolich | 52 | Boarder | Carpenter | Austria |
| 38 | John Goraich | 52 | Boarder | Rigger | Austria |
| 39 | John Kowalski THIS PERSON | 40 | Head | Laborer | Poland |
| 40 | Stella Kowalski | 37 | Wife | — | Poland |
| 41 | Mary Kowalski | 13 | Daughter | — | Pennsylvania |
| 42 | Stanley Kowalski | 11 | Son | — | Pennsylvania |
| 43 | Jennie Kowalski | 9 | Daughter | — | Pennsylvania |
| 44 | Frances Kowalski | 7 | Daughter | — | Pennsylvania |
| 45 | Leo Kowalski | 5 | Son | — | Pennsylvania |
| 46 | Regina Kowalski | 2 | Daughter | — | Pennsylvania |
| 47 | John Kowalski | 0 | Son | — | Pennsylvania |
| 48 | Stanley Olinski | 44 | Head | Grocer | Poland |
| 49 | Mary Olinski | 38 | Wife | — | Poland |
| 50 | Charles Olinski | 16 | Son | Heater | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)