JM
John Mayer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Joseph-County, Michigan
Our Model Tree links this John Mayer across the 1920, 1930 and 1940 US Censuses in St.-Joseph-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 3-person household.
Age 64
b. ~1876
Male
Head
Born: Hungary
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Michigan |
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Hungary |
| 1935 Residence (City) | Fabius Township |
| 1935 Residence (County) | St. Joseph |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Shoe repairman |
| Industry | Shoe shop |
| Class of Worker | OA |
| Hours Worked | 20 |
| Income (1939) | 75 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
| Occupation | Shoe Repairman |
| Township / Ward | Fabius Township |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mayer | Head | — | 64 | ~1876 |
| Henry Mayer | Son | — | 24 | ~1916 |
| Mary Mayer | Spouse | — | 62 | ~1878 |
Census Appearances
1920
St Joseph, …
Head, age 44
St Joseph, Michigan · implied b. ~1876 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Hungary |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | Merchant |
| Industry | Grocery Store |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Hungary |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | hungary |
1930
St Joseph, …
Head, age 55
St Joseph, Michigan · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Hungary |
| Naturalization Status | Naturalized |
| Year of Immigration | 1908 |
| Age at First Marriage | 22 |
| Father's Birthplace | Hungary |
| Mother's Birthplace | Hungary |
| Occupation | Shoemaker |
| Industry | Repairing Shoes |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
1940
St.-Joseph-County, Michigan
Head, age 64
St.-Joseph-County, Michigan · implied b. ~1876 — 3 household members
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Hungary |
| 1935 Residence (City) | Fabius Township |
| 1935 Residence (County) | St. Joseph |
| Naturalization Status | Naturalized |
| Occupation | Shoe repairman |
| Industry | Shoe shop |
| Class of Worker | OA |
| Hours Worked | 20 |
| Income (1939) | 75 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth Country | Hungary |
| Birthplace (normalized) | hungary |
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 Mayer 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 Mayer
Head · 1940 · age 64 · b. ~1876 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Joseph-County, Michigan
Open full size
1940 US Federal Census — St.-Joseph-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01817-00166)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Kerr | 7 | son | — | Michigan |
| 2 | Marilu Kerr | 2 | daughter | — | Michigan |
| 3 | Marjorie M. Kern | 47 | Head | No | Michigan |
| 4 | Douglas R. Kern | 12 | son | — | Michigan |
| 5 | James Gordon Kern | 10 | son | — | Michigan |
| 6 | Bert De Long | 38 | Head | — | New York |
| 7 | Burton S. Seed | 33 | Head | Laborer | Michigan |
| 8 | Bertha Seed | 29 | wife | — | Michigan |
| 9 | Donald Seed | 12 | son | — | Michigan |
| 10 | Verlynn Seed | 5 | son | — | Michigan |
| 11 | Shirlee Seed | 2 | daughter | — | Michigan |
| 12 | Henry Irwin | 50 | Head | Laborer | Michigan |
| 13 | Lucille Irwin | 36 | wife | — | Michigan |
| 14 | James Irwin | 15 | son | — | Michigan |
| 15 | Elden Irwin | 13 | son | — | Michigan |
| 16 | Donna Jean Irwin | 12 | daughter | — | Michigan |
| 17 | Dorothy Irwin | 10 | daughter | — | Michigan |
| 18 | Robert Irwin | 7 | son | — | Michigan |
| 19 | Betty Lou Irwin | 4 | daughter | — | Michigan |
| 20 | John Mayer THIS PERSON | 64 | Head | Shoe Repairman | Hungary |
| 21 | Mary Anna Mayer | 62 | wife | — | Hungary |
| 22 | Henry Mayer | 24 | son | Laborer | Michigan |
| 23 | Lester Enos | 38 | Head | — | Ohio |
| 24 | Anna Selena Enos | 35 | wife | Machine Operator | Michigan |
| 25 | Marianna Enos | 12 | daughter | — | Michigan |
| 26 | Jerry Levan Enos | 5 | son | — | Michigan |
| 27 | George Harding | 36 | Head | Core Maker | Michigan |
| 28 | Irene Harding | 31 | wife | — | Michigan |
| 29 | Mary Jane Harding | 5 | daughter | — | Michigan |
| 30 | Delbert K. Cole | 53 | Head | Shipping Clerk | Indiana |
| 31 | Blanch Cole | 51 | wife | — | Indiana |
| 32 | Ellen Cole | 19 | daughter | — | Michigan |
| 33 | Kyra Cole | 18 | daughter | — | Michigan |
| 34 | Juanita Cole | 15 | daughter | — | Michigan |
| 35 | George Cole | 13 | son | — | Michigan |
| 36 | Ruth Cole | 11 | daughter | — | Michigan |
| 37 | Delbert Jr. Cole | 9 | son | — | Michigan |
| 38 | Arthur Ferguson | 66 | Head | Laborer | Michigan |
| 39 | Gordon Mohney | 28 | Head | Laborer | Michigan |
| 40 | Elizabeth Mohney | 28 | wife | — | California |
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)