JK
John Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Huron-County, Michigan
Our Model Tree links this John Kowalski across the 1920, 1930 and 1940 US Censuses in Huron-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 4-person household.
Age 51
b. ~1889
Male
Head
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Huron-County, Michigan |
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Sand Beach Twp |
| Additional Details | |
| Occupation | Farmer |
| Industry | on Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Farmer |
| Township / Ward | Sand Beach Twp |
| Est. Birth Year | ~1889 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Robert Thayer | Other | — | 35 | ~1905 |
| Rose Kowalski | Spouse | — | 54 | ~1886 |
| Margaret Kowalski | Daughter | — | 21 | ~1919 |
| John Kowalski | Head | — | 51 | ~1889 |
Census Appearances
1920
Huron, Michigan
Head, age 31
Huron, Michigan · implied b. ~1889
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Michigan |
| Father's Birthplace | Germany |
| Mother's Birthplace | German |
| Occupation | yes |
| Industry | Laborer |
| Class of Worker | Home Farm |
| Can Read | German |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Germany |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Huron, Michigan
Head, age 41
Huron, Michigan · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 27 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Michigan |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Radio Set | R |
| Veteran | No |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Huron-County, Michigan
Head, age 51
Huron-County, Michigan · implied b. ~1889 — 4 household members
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Sand Beach Twp |
| Occupation | Farmer |
| Industry | on Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kowalski
Head · 1940 · age 51 · b. ~1889 · Michigan
★ 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 — Huron-County, Michigan
Open full size
1940 US Federal Census — Huron-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01758-00668)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wm J. Eisenmacker | 58 | Head | Farmer | Michigan |
| 2 | Agnes Eisenmacker | 41 | Wife | House Keeper | Michigan |
| 3 | David Eisenmacker | 23 | Son | Farm Labor | Michigan |
| 4 | Arthur Eisenmacker | 19 | Son | Farm Labor | Michigan |
| 5 | Howard Eisenmacker | 15 | Son | Farm Labor | Michigan |
| 6 | Verna Eisenmacker | 13 | Daughter | — | Michigan |
| 7 | Edna Eisenmacker | 7 | Daughter | — | Michigan |
| 8 | Donald Eisenmacker | 6 | Son | — | Michigan |
| 9 | August Nentel | 63 | Head | Farmer | Germany |
| 10 | Bertha Nentel | 59 | Wife | — | Michigan |
| 11 | Herbert Nentel | 28 | Son | Farm Labor | Michigan |
| 12 | Ernest Nentel | 20 | Son | Farm Labor | Michigan |
| 13 | John Kowalski THIS PERSON | 51 | Head | Farmer | Michigan |
| 14 | Rose Kowalski | 54 | Wife | House Keeper | Michigan |
| 15 | Margaret Kowalski | 21 | Daughter | Farm Laborer | Michigan |
| 16 | Robert W. Thayer | 35 | Employee | Farm Laborer | Michigan |
| 17 | Chas Lee | 28 | Head | Farm Laborer | Michigan |
| 18 | Anna Lee | 21 | Wife | House Keeper | Michigan |
| 19 | Robert Baum | 48 | Head | Farmer | Michigan |
| 20 | Mary Baum | 42 | Wife | House Keeper | Michigan |
| 21 | Magdalene Baum | 20 | Daughter | Beautician | Michigan |
| 22 | Margaret Baum | 20 | Daughter | Beautician | Michigan |
| 23 | Clarence Baum | 18 | Son | Farm Labor | Michigan |
| 24 | Gladys Baum | 16 | Daughter | Farm Labor | Michigan |
| 25 | Leo Baum | 13 | Son | — | Michigan |
| 26 | Robert Jr. Baum | 8 | Son | — | Michigan |
| 27 | Earl Baum | 6 | Son | — | Michigan |
| 28 | Bernard Booms | 31 | Head | Farmer | Michigan |
| 29 | Edward Tomasy | 55 | Head | Farmer | Michigan |
| 30 | Olive Tomasy | 51 | Wife | Home | Canada |
| 31 | Robert Rumansau | 42 | Head | Farmer | Michigan |
| 32 | Emily J. Rumansau | 42 | Wife | Home | Ireland |
| 33 | Robert D. Rumansau | 7 | Son | — | Michigan |
| 34 | Gerald Rumansau | 6 | Son | — | Michigan |
| 35 | Bertha J. Rumansau | 2 | Daughter | — | Michigan |
| 36 | Alexander Rumansau | 2 | Son | — | Michigan |
| 37 | Clement Herbnegt | 31 | Head | Farmer | Michigan |
| 38 | Cecelia Herbnegt | 32 | Wife | Home | Michigan |
| 39 | Raymond Herbnegt | 7 | Son | — | Michigan |
| 40 | Deloris Herbnegt | 4 | Daughter | — | Michigan |
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)