MK
Mary Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Luzerne, Pennsylvania
Our Model Tree links this Mary Kowalski across the 1920 and 1930 US Censuses in Luzerne, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 9-person household.
Age 14
b. ~1916
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Luzerne, Pennsylvania |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Hazleton City |
| 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Michael Kowalski | Son | — | 5 | ~1925 |
| Adam Kowalski | Son | — | 15 | ~1915 |
| Joseph Kowalski | Son | — | 12 | ~1918 |
| Stanley Kowalski | Son | — | 2 | ~1928 |
| Thomas Kowalski | Son | — | 9 | ~1921 |
| Joseph Kowalski | Head | — | 42 | ~1888 |
| Mary Kowalski | Daughter | — | 14 | ~1916 |
| John Kowalski | Son | — | 8 | ~1922 |
| Sophia Kowalski | Other | — | 33 | ~1897 |
Census Appearances
1920
Luzerne, Pennsylvania
Daughter, age 3
Luzerne, Pennsylvania · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Luzerne, Pennsylvania
Daughter, age 14
Luzerne, Pennsylvania · implied b. ~1916 — 9 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| 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 |
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 Mary Kowalski across 2 US Census years (1920 and 1930) in Luzerne, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kowalski
Daughter · 1930 · age 14 · b. ~1916 · Pennsylvania
★ You are viewing this record
Sibling
Adam Kowalski
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Kowalski
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Kowalski
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Kowalski
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kowalski
Sibling · 1930 · age 12
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 — Luzerne, Pennsylvania
Open full size
1930 US Federal Census — Luzerne, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2068:0719)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Sajko | 13 | Daughter | — | Pennsylvania |
| 2 | Helen Sajko | 11 | Daughter | — | Pennsylvania |
| 3 | Albert Sajko | 10 | Son | — | Pennsylvania |
| 4 | George Sajko | 8 | Son | — | Pennsylvania |
| 5 | Steve Sajko | 7 | Son | — | Pennsylvania |
| 6 | Michael Catrone | 54 | Head | Laborer | Italy |
| 7 | Catherine Catrone | 49 | Wife-H | — | Italy |
| 8 | Joseph Provitt | 24 | Head | Miner | Pennsylvania |
| 9 | Mary C. Provitt | 20 | Wife-H | — | Pennsylvania |
| 10 | Rosemary Provitt | 0 | Daughter | — | Pennsylvania |
| 11 | Joseph Kowalski | 42 | Head | Miner | Poland |
| 12 | Sophia Kowalski | 33 | Wife-H | — | Pennsylvania |
| 13 | Adam Kowalski | 15 | Son | — | Pennsylvania |
| 14 | Mary Kowalski THIS PERSON | 14 | Daughter | — | Pennsylvania |
| 15 | Joseph Kowalski | 12 | Son | — | Pennsylvania |
| 16 | Thomas Kowalski | 9 | Son | — | Pennsylvania |
| 17 | John Kowalski | 8 | Son | — | Pennsylvania |
| 18 | Michael Kowalski | 5 | Son | — | Pennsylvania |
| 19 | Stanley Kowalski | 2 | Son | — | Pennsylvania |
| 20 | Joseph Scalise | 33 | Head | Laborer | Italy |
| 21 | Christine H. Scalise | 25 | Wife-H | — | Pennsylvania |
| 22 | Joseph Scalise | 1 | Son | — | Pennsylvania |
| 23 | Felix Scalise | 34 | Head | Laborer | Italy |
| 24 | Jennie Scalise | 30 | Wife-H | — | Pennsylvania |
| 25 | Donald Scalise | 2 | Son | — | Pennsylvania |
| 26 | Amidio Schiavone | 54 | Head | Laborer | Italy |
| 27 | Mary Schiavone | 45 | Wife-H | — | Italy |
| 28 | Alberto Schiavone | 15 | Son | Waiter | Pennsylvania |
| 29 | Charles Schiavone | 10 | Son | — | Pennsylvania |
| 30 | Neil Schiavone | 7 | Son | — | Pennsylvania |
| 31 | Marrow Custis | 45 | Head | Laborer | Italy |
| 32 | Josephine Custis | 43 | Wife-H | — | Italy |
| 33 | John Custis | 18 | Son | Laborer | Pennsylvania |
| 34 | Neil Custis | 15 | Son | — | Pennsylvania |
| 35 | Dominick Custis | 11 | Son | — | Pennsylvania |
| 36 | Marie Custis | 17 | Daughter | Laborer | Pennsylvania |
| 37 | Frank Roman | 45 | Head | Laborer | Pennsylvania |
| 38 | Grace Roman | 42 | Wife-H | — | Italy |
| 39 | Anthony Roman | 20 | Son | Deliveryman | Pennsylvania |
| 40 | Nellie Roman | 15 | Daughter | — | Pennsylvania |
| 41 | Carmella Roman | 15 | Daughter | — | Pennsylvania |
| 42 | Carmen Roman | 14 | Son | — | Pennsylvania |
| 43 | Laura Roman | 12 | Daughter | — | Pennsylvania |
| 44 | Angeline Roman | 8 | Daughter | — | Pennsylvania |
| 45 | Dominick Cameron | 22 | Head | Laborer | Pennsylvania |
| 46 | Rose Cameron | 19 | Wife-H | — | Pennsylvania |
| 47 | Neil Roman | 41 | Head | Laborer | Italy |
| 48 | Justine Roman | 33 | Wife-H | — | Italy |
| 49 | Pasco Roman | 12 | Son | — | Pennsylvania |
| 50 | Pauline Roman | 8 | Daughter | — | Pennsylvania |
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)