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Mary Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hampshire, Massachusetts
Our Model Tree links this Mary Kowalski across the 1920 and 1930 US Censuses in Hampshire, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1913), then head of a 10-person household.
Age 17
b. ~1913
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hampshire, Massachusetts |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Occupation | Laborer |
| Industry | Tobacco Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Hatfield Village |
| Est. Birth Year | ~1913 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jennie Kowalski | Daughter | — | 15 | ~1915 |
| Michael Kowalski | Head | — | 43 | ~1887 |
| Frank Kowalski | Son | — | 10 | ~1920 |
| Mary Kowalski | Daughter | — | 17 | ~1913 |
| Patrick Kowalski | Son | — | 13 | ~1917 |
| Sophia Kowalski | Daughter | — | 11 | ~1919 |
| Mary Kowalski | Spouse | — | 39 | ~1891 |
| Helen Kowalski | Daughter | — | 8 | ~1922 |
| Chester Kowalski | Son | — | 19 | ~1911 |
| John Kowalski | Son | — | 21 | ~1909 |
Census Appearances
1920
Franklin, Massachusetts
Daughter, age 7
Franklin, Massachusetts · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Hampshire, Massachusetts
Daughter, age 17
Hampshire, Massachusetts · implied b. ~1913 — 10 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Tobacco Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kowalski
Daughter · 1930 · age 17 · b. ~1913 · Massachusetts
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Sibling
Jennie Kowalski
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kowalski
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sophia Kowalski
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Kowalski
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Kowalski
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kowalski
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Chester Kowalski
Sibling · 1930 · age 19
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 — Hampshire, Massachusetts
Open full size
1930 US Federal Census — Hampshire, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel913:0080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Clementine Rogalski | 34 | Wife | — | Poland |
| 52 | George Rogalski | 17 | Son | Laborer | Poland |
| 53 | Janice Rogalski | 12 | Daughter | Laborer | Mass |
| 54 | Emma Rogalski | 9 | Daughter | — | Mass |
| 55 | Frank Miewinski | 35 | Head | Mason | Poland |
| 56 | Helen Miewinski | 27 | Wife | — | Poland |
| 57 | Frances Miewinski | 5 | Daughter | — | Massachusetts |
| 58 | Sophia Miewinski | 1 | Daughter | — | Massachusetts |
| 59 | Stanley Krzyzyck | 32 | Head | Laborer | Poland |
| 60 | Bertha Krzyzyck | 27 | Wife | — | Poland |
| 61 | Stanley Krzyzyck | 1 | Son | — | Massachusetts |
| 62 | John Riposki | 23 | Head | Laborer | Massachusetts |
| 63 | Anna Riposki | 21 | Wife | Laborer | Massachusetts |
| 64 | Helen Riposki | 2 | Daughter | — | Massachusetts |
| 65 | Irene Riposki | 0 | Daughter | — | Massachusetts |
| 66 | Michael Kowalski | 43 | Head | Laborer | Poland |
| 67 | Mary Kowalski | 39 | Wife | — | Poland |
| 68 | John Kowalski | 21 | Son | Laborer | Massachusetts |
| 69 | Chester Kowalski | 19 | Son | Laborer | Massachusetts |
| 70 | Mary Kowalski THIS PERSON | 17 | Daughter | Laborer | Massachusetts |
| 71 | Jennie Kowalski | 15 | Daughter | — | Massachusetts |
| 72 | Patrick Kowalski | 13 | Son | — | Massachusetts |
| 73 | Sophia Kowalski | 11 | Daughter | — | Massachusetts |
| 74 | Frank Kowalski | 10 | Son | — | Massachusetts |
| 75 | Helen Kowalski | 8 | Daughter | — | Massachusetts |
| 76 | William Dziwil | 42 | Head | Laborer | Poland |
| 77 | Valerie Dziwil | 38 | Wife | Laborer | Poland |
| 78 | Stella Dziwil | 12 | Daughter | — | Massachusetts |
| 79 | Sophia Dziwil | 10 | Daughter | — | Massachusetts |
| 80 | Raymond Dziwil | 8 | Son | — | Poland |
| 81 | Wilfred Labbee | 22 | Head | Truck Driver | Massachusetts |
| 82 | Alice Labbee | 18 | Wife | — | Massachusetts |
| 83 | Shirley Labbee | 1 | Daughter | — | Massachusetts |
| 84 | John Skarzyinski | 34 | Head | Farmer | Poland |
| 85 | Eugenia Skarzyinski | 28 | Wife | Laborer | Rhode Island |
| 86 | John Skarzyinski | 2 | Son | — | Massachusetts |
| 87 | John Michalowski | 33 | Head | Laborer | Poland |
| 88 | Amelia Michalowski | 34 | Wife | — | Poland |
| 89 | Stanley Michalowski | 8 | Son | — | Massachusetts |
| 90 | Edward Michalowski | 6 | Son | — | Massachusetts |
| 91 | Jennie Michalowski | 4 | Daughter | — | Massachusetts |
| 92 | Jessie Michalowski | 2 | Daughter | — | Massachusetts |
| 93 | Helen Michalowski | 0 | Daughter | — | Massachusetts |
| 94 | Matt Flocha | 33 | Head | Proprietor | Poland |
| 95 | William Thoupak | 42 | Head | Farmer | Poland |
| 96 | Jessie Thoupak | 35 | Wife | Laborer | Poland |
| 97 | Stanley Thoupak | 17 | Son | Laborer | Massachusetts |
| 98 | John Thoupak | 15 | Son | Laborer | Massachusetts |
| 99 | Helen Thoupak | 12 | Daughter | Laborer | Massachusetts |
| 100 | Chester Thoupak | 9 | Son | — | Massachusetts |
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)