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Mary Herman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Joseph-County, Indiana
Our Model Tree links this Mary Herman across the 1930 and 1940 US Censuses in St.-Joseph-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Indiana |
| Surname | Herman |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | South Bend |
| Est. Birth Year | ~1922 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Christine Herman | Daughter | — | 30 | ~1910 |
| Estelle Buchanan | Daughter | — | 34 | ~1906 |
| Joseph Herman | Head | — | 65 | ~1875 |
| Mary Herman | Daughter | — | 18 | ~1922 |
| Elizabeth Herman | Spouse | — | 56 | ~1884 |
| John Herman | Son | — | 21 | ~1919 |
| Edward Herman | Son | — | 15 | ~1925 |
| Stanley Herman | Son | — | 26 | ~1914 |
| Gladys Herman | Daughter | — | 23 | ~1917 |
| Betty Buchanan | Daughter | — | 15 | ~1925 |
Census Appearances
1930
St Joseph, …
Daughter, age 7
St Joseph, Indiana · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Heuermann |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
St.-Joseph-County, Indiana
Daughter, age 18
St.-Joseph-County, Indiana · implied b. ~1922 — 10 household members
| Surname | Herman |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend |
| 1935 Residence (County) | St. Joseph |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Herman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Herman
Daughter · 1940 · age 18 · b. ~1922 · Indiana
★ You are viewing this record
Sibling
Edward Herman
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Buchanan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Herman
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Estelle Buchanan
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Herman
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christine Herman
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Herman
Sibling · 1940 · age 26
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
1940 US Federal Census — St.-Joseph-County, Indiana
Open full size
1940 US Federal Census — St.-Joseph-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01133-00877)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Strickler | 64 | Head | Private | Indiana |
| 2 | Berta Strickler | 53 | Wife | Maid | Hungary |
| 3 | William Wistrowski | 57 | Head | Assembler | Poland |
| 4 | Constancia Wistrowski | 53 | Wife | — | Poland |
| 5 | Felix L. Wistrowski | 24 | Head | Chemistry Teacher | Indiana |
| 6 | Stephanie Wistrowski | 26 | Wife | — | Indiana |
| 7 | Angelo Wistrowski | 0 | Daughter | — | Indiana |
| 8 | Joseph Herman | 65 | Head | Janitor | Poland |
| 9 | Elizabeth Herman | 56 | Wife | — | Poland |
| 10 | Christine C. Herman | 30 | Daughter | Cashier | Indiana |
| 11 | Stanley A. Herman | 26 | Son | Assembler | Indiana |
| 12 | Gladys J. Herman | 23 | Daughter | — | Indiana |
| 13 | John J. Herman | 21 | Son | Janitor | Indiana |
| 14 | Mary J. Herman THIS PERSON | 18 | Daughter | — | Indiana |
| 15 | Edward Herman | 15 | Son | — | Indiana |
| 16 | Estelle Buchanan | 34 | Daughter | Assembler | Poland |
| 17 | Betty J. Buchanan | 15 | Daughter | — | Indiana |
| 18 | Leo Czarnecki | 48 | Head | Receiving Dept. Clerk | Poland |
| 19 | Theresa Czarnecki | 48 | Wife | — | New York |
| 20 | Dorothy S. Czarnecki | 17 | Daughter | — | Indiana |
| 21 | Leo Jr. Czarnecki | 14 | Son | — | Indiana |
| 22 | Joseph M. Czarnecki | 13 | Son | — | Indiana |
| 23 | Theresa J. Czarnecki | 7 | Daughter | — | Indiana |
| 24 | Florence Purey | 66 | Head | — | Russia |
| 25 | Jane Purey | 32 | Daughter | Saleslady | Indiana |
| 26 | Belle Markus | 35 | Daughter | Saleslady | Indiana |
| 27 | Madeline Markus | 15 | Daughter | — | Indiana |
| 28 | Bernard Markus | 11 | Son | — | Indiana |
| 29 | John Weber | 68 | Head | — | Hungary |
| 30 | Elizabeth Weber | 64 | Wife | — | Hungary |
| 31 | Betty M. Dekko | 37 | Daughter | Stenographer | Hungary |
| 32 | John Psaraki | 48 | Head | Assembler | Greece |
| 33 | Mary Psaraki | 40 | Wife | — | Greece |
| 34 | Anna Psaraki | 19 | Daughter | New Worker | Greece |
| 35 | Joseph Kovatch | 54 | Head | Laborer | Hungary |
| 36 | Catherine Kovatch | 62 | Wife | — | Ireland |
| 37 | Florence Podell | 37 | Son | Assembler | Indiana |
| 38 | Martha B. Podell | 34 | Daughter | Beautician | Indiana |
| 39 | Miriam Medden | 73 | Sister in law | — | Ireland |
| 40 | Stella Kowalski | 64 | Head | — | Indiana |
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)