MK
Mary Kozlowski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Wayne, Michigan
Our Model Tree links this Mary Kozlowski across the 1930 and 1940 US Censuses in Wayne, Michigan (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 8-person household.
Age 54
b. ~1876
Female
Head
Born: Poland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Wayne, Michigan |
| Surname | Kozlowski |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Poland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1893 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | No |
| Mother Tongue | Polish |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Township / Ward | City Of Detroit |
| Est. Birth Year | ~1876 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Kozlowski | Son | — | 33 | ~1897 |
| Mary Kozlowski | Head | — | 54 | ~1876 |
| Raymond Kozlowski | Other | — | 4 | ~1926 |
| Joseph Kozlowski | Son | — | 22 | ~1908 |
| Lawrence Kozlowski | Son | — | 26 | ~1904 |
| Emily Kozlowski | Daughter | — | 14 | ~1916 |
| Stella Kozlowski | Daughter | — | 20 | ~1910 |
| Irene Kozlowski | Daughter | — | 23 | ~1907 |
Census Appearances
1930
Wayne, Michigan
Head, age 54
Wayne, Michigan · implied b. ~1876 — 8 household members
| Surname | Kozlowski |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Poland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1893 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | No |
| Mother Tongue | Polish |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Wayne-County, Michigan
Head, age 65
Wayne-County, Michigan · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kozlowsky |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Poland |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Alien |
| Occupation | Stenographer |
| Industry | Thread Factory |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 385 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| 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 Mary Kozlowski across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Kozlowski
Head · 1930 · age 54 · b. ~1876 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Wayne, Michigan
Open full size
1930 US Federal Census — Wayne, Michigan
Page Contents
49 people indexed on this census page (ia:1930:michigancensus00reel1045:0229)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jacob Marshek | 75 | Head | Watchman | Czechoslovakia |
| 2 | Albert W Marshek | 45 | Son | — | Michigan |
| 3 | Bertha Marshek | 41 | Daughter-in-law | Saleswoman | Germany |
| 4 | Howard C Marshek | 22 | Son | Press Operator | Michigan |
| 5 | Frederick Marshek | 10 | Son | — | Michigan |
| 6 | Jacob Marshek | 6 | Son | — | Michigan |
| 7 | Alberta Marshek | 2 | Daughter | — | Michigan |
| 8 | Ignatius Sururkiwicz | 52 | Head | Cook | Poland |
| 9 | Antonia Sururkiwicz | 44 | Wife | — | Poland |
| 10 | Joanna Sururkiwicz | 21 | Daughter | Dipper | Michigan |
| 11 | Henry Sururkiwicz | 19 | Son | Laborer | Michigan |
| 12 | John Sururkiwicz | 17 | Son | — | Michigan |
| 13 | Florian Sururkiwicz | 14 | Son | — | Michigan |
| 14 | Virginia Sururkiwicz | 12 | Daughter | — | Michigan |
| 15 | Beatrice Sururkiwicz | 10 | Daughter | — | Michigan |
| 16 | Anthony Vesely | 43 | Head | Erector | Czechoslovakia |
| 17 | Mary Vesely | 39 | Wife | — | Czechoslovakia |
| 18 | Rudolph Vesely | 21 | Son | Filler | Illinois |
| 19 | Mildred Vesely | 15 | Son | — | Illinois |
| 20 | Arthur Vesely | 12 | Son | — | Michigan |
| 21 | Anna Vesely | 16 | Daughter | — | Michigan |
| 22 | Jessie Vesely | 15 | Daughter | — | Michigan |
| 23 | Rose Vesely | 13 | Daughter | — | Michigan |
| 24 | Emma Vesely | 11 | Daughter | — | Maryland |
| 25 | Joseph Vesely | 8 | Son | — | Michigan |
| 26 | Helen Vesely | 6 | Daughter | — | Michigan |
| 27 | Kozlowski | None | — | — | — |
| 28 | Mary Kozlowski THIS PERSON | 54 | Head | — | Poland |
| 29 | John Kozlowski | 33 | Son | Tool Maker | Pennsylvania |
| 30 | Lawrence Kozlowski | 26 | Son | Tool Maker | Pennsylvania |
| 31 | Joseph Kozlowski | 22 | Son | Tool Maker | Pennsylvania |
| 32 | Stella Kozlowski | 20 | Daughter | Clerk | Pennsylvania |
| 33 | Emily Kozlowski | 14 | Daughter | — | Michigan |
| 34 | Irene Kozlowski | 23 | Daughter | Clerk | Pennsylvania |
| 35 | Raymond Kozlowski | 4 | Grandson | — | Michigan |
| 36 | Paul Trarok | 47 | Head | Auto Repair | Czechoslovakia |
| 37 | Eva Trarok | 42 | Wife | — | Czechoslovakia |
| 38 | Francis M Tullyore | 40 | Head | Assembler | Iowa |
| 39 | Jessie Tullyore | 40 | Wife | — | Irish Free State |
| 40 | John Lugg | 51 | Roomer | Rod Carrier | Sweden |
| 41 | Axel Jensen | 52 | Roomer | Laborer | Sweden |
| 42 | Carl Tidilman | 41 | Roomer | Rod Carrier | Sweden |
| 43 | Herman Carlson | 34 | Roomer | Fireman | Sweden |
| 44 | John Marek | 55 | Head | Inspector | Michigan |
| 45 | Mary Marek | 54 | Wife | — | Germany |
| 46 | Virginia Marek | 8 | Daughter | — | Michigan |
| 47 | Arthur Jr Marek | 5 | Son | — | Michigan |
| 48 | Arthur Marek | 32 | Son-in-law | Photo-Engraver | Michigan |
| 49 | Emily Marek | 29 | Daughter | — | Michigan |
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)