MK
Mary Kuhn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this Mary Kuhn across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 6-person household.
Age 10
b. ~1930
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Kuhn |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Schererville Town |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same House |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Schererville Town |
| Est. Birth Year | ~1930 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Adeline Kuhn | Spouse | — | 34 | ~1906 |
| Mary Kuhn | Daughter | — | 10 | ~1930 |
| Mathias Kuhn | Head | — | 43 | ~1897 |
| Dennis Kuhn | Son | — | 8 | ~1932 |
| Clarence Kuhn | Son | — | 13 | ~1927 |
| Adele Kuhn | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Lake, Indiana
Daughter, age 1
Lake, Indiana · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kuhn |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Daughter, age 10
Lake-County, Indiana · implied b. ~1930 — 6 household members
| Surname | Kuhn |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Schererville Town |
| 1935 Residence (County) | Lake |
| Highest Grade | 4 |
| 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 Kuhn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kuhn
Daughter · 1940 · age 10 · b. ~1930 · Indiana
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Sibling
Clarence Kuhn
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dennis Kuhn
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Adele Kuhn
Sibling · 1940 · age 5
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01068-00910)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer Jack | 41 | Head | Teacher | Illinois |
| 2 | Frances Jack | 40 | Wife | — | Illinois |
| 3 | Ruth Jack | 14 | Daughter | — | Illinois |
| 4 | Joan Jack | 9 | Daughter | — | Indiana |
| 5 | Porter Jack | 2 | Son | — | Illinois |
| 6 | John S. Spindler | 53 | Head | Printer | Illinois |
| 7 | Julia Spindler | 52 | Wife | — | Illinois |
| 8 | Caroline Spindler | 17 | Daughter | — | Indiana |
| 9 | Mary Spindler | 84 | Head | — | Bohemia |
| 10 | Mathias Kuhn | 43 | Head | Clerk | Indiana |
| 11 | Adeline Kuhn | 34 | Wife | — | Indiana |
| 12 | Clarence Kuhn | 13 | Son | — | Indiana |
| 13 | Mary Ellen Kuhn THIS PERSON | 10 | Daughter | — | Indiana |
| 14 | Dennis Kuhn | 8 | Son | — | Indiana |
| 15 | Adele Rose Kuhn | 5 | Daughter | — | Indiana |
| 16 | Elizabeth Helfen | 42 | Head | — | Indiana |
| 17 | Josephine Fisher | 19 | Daughter | — | Indiana |
| 18 | Elsie Fisher | 16 | Daughter | — | Indiana |
| 19 | Helen Fisher | 14 | Daughter | — | Indiana |
| 20 | William Sr. Helbrick | 55 | Head | Chief Car Inspector | Indiana |
| 21 | Elizabeth Helbrick | 51 | Wife | — | Indiana |
| 22 | Herbert Helbrick | 29 | Son | Car Inspector | Indiana |
| 23 | Lillian Helbrick | 24 | Daughter | — | Indiana |
| 24 | Florence Helbrick | 23 | Daughter | Waitress | Indiana |
| 25 | Leona Helbrick | 19 | Daughter | — | Indiana |
| 26 | Genevieve Helbrick | 17 | Daughter | — | Indiana |
| 27 | Sylvia Helbrick | 15 | Daughter | — | Indiana |
| 28 | William Helbrick | 13 | Son | — | Indiana |
| 29 | Betty Jane Helbrick | 11 | Daughter | — | Indiana |
| 30 | Robert Helbrick | 7 | Son | — | Indiana |
| 31 | Earl Helbrick | 4 | Son | — | Indiana |
| 32 | Sharon Leigh Helbrick | 0 | Grand-daughter | — | Indiana |
| 33 | Alphonse Grothaus | 34 | Head | Laborer | Indiana |
| 34 | Catherine Grothaus | 30 | Wife | — | Indiana |
| 35 | Anthony Redar | 23 | Brother-in-law | Attendant | Indiana |
| 36 | Margaret Redar | 16 | Sister-in-law | — | Indiana |
| 37 | Dorothy Redar | 13 | Sister-in-law | — | Indiana |
| 38 | Sylvester Redar | 11 | Brother-in-law | — | Indiana |
| 39 | Clara Redar | 9 | Sister-in-law | — | Indiana |
| 40 | Raymond Redar | 7 | Brother-in-law | — | 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)