JF
John Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Elkhart-County, Indiana
Our Model Tree links this John Frederick across the 1920, 1930 and 1940 US Censuses in Elkhart-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 3-person household.
Age 58
b. ~1882
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Elkhart-County, Indiana |
| Surname | Frederick |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Union Township |
| 1935 Residence (County) | Elkhart |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | C 1 |
| 1935 Residence | Same House |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Farmer |
| Township / Ward | Union Township |
| Est. Birth Year | ~1882 |
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 Frederick | Head | — | 58 | ~1882 |
| Maud Frederick | Spouse | — | 66 | ~1874 |
| Carlyle Frederick | Son | — | 18 | ~1922 |
Census Appearances
1920
Elkhart, Indiana
Head, age 39
Elkhart, Indiana · implied b. ~1881 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Elkhart, Indiana
Head, age 48
Elkhart, Indiana · implied b. ~1882 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Indiana |
| Occupation | Farmer |
| Industry | Own farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Elkhart-County, Indiana
Head, age 58
Elkhart-County, Indiana · implied b. ~1882 — 3 household members
| Surname | Frederick |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Union Township |
| 1935 Residence (County) | Elkhart |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | C 1 |
| 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 John Frederick 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 Frederick
Head · 1940 · age 58 · b. ~1882 · Indiana
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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 — Elkhart-County, Indiana
Open full size
1940 US Federal Census — Elkhart-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01041-00875)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Agnes Muntz | 13 | daughter | — | Indiana |
| 42 | Jacob Muntz | 71 | Father | — | Germany |
| 43 | George Peters | 58 | Head | All Around Laborer | Indiana |
| 44 | Anna Peters | 58 | Wife | Cutter | Indiana |
| 45 | Clifford H. Peters | 37 | Head | Millwright | Indiana |
| 46 | Ethel Peters | 36 | Wife | — | Indiana |
| 47 | Charles R. Peters | 16 | son | — | Indiana |
| 48 | Jean Anna Peters | 13 | daughter | — | Indiana |
| 49 | Carrie E. Peters | 11 | daughter | — | Indiana |
| 50 | Elmer Wise | 47 | Head | Farmer | Indiana |
| 51 | Anna Wise | 52 | Wife | — | Indiana |
| 52 | Norman Wise | 23 | son | — | Indiana |
| 53 | Manford Wise | 22 | son | Farmer | Indiana |
| 54 | Opal Wise | 19 | daughter | — | Indiana |
| 55 | Lois Wise | 14 | daughter | — | Indiana |
| 56 | Warren Bechtel | 39 | Head | Farmer | Indiana |
| 57 | Mary Bechtel | 34 | Wife | — | Indiana |
| 58 | Margaret Bechtel | 12 | daughter | — | Indiana |
| 59 | Doris Bechtel | 10 | daughter | — | Indiana |
| 60 | Alice Bechtel | 6 | daughter | — | Indiana |
| 61 | Tobias Ramer | 51 | Head | Farmer | Indiana |
| 62 | Salina Ramer | 54 | Wife | — | Indiana |
| 63 | Monroe Ramer | 20 | son | Farmer | Indiana |
| 64 | Merle Ramer | 16 | son | — | Indiana |
| 65 | Virginia Ramer | 13 | daughter | — | Indiana |
| 66 | Matilda Lehman | 89 | Mother-in-law | — | Canada English |
| 67 | Jesse Lehman | 70 | Head | Farmer | Ohio |
| 68 | John W. Anglemyer | 60 | Head | Day Laborer | Indiana |
| 69 | Sarah Anglemyer | 55 | Wife | — | Indiana |
| 70 | Calvin Treisch | 47 | Head | Day Laborer | Indiana |
| 71 | Almeda Treisch | 53 | Wife | — | Indiana |
| 72 | Lydia Ann Treisch | 76 | mother | — | Ohio |
| 73 | John D. Frederick THIS PERSON | 58 | Head | Farmer | Indiana |
| 74 | Maud Frederick | 66 | Wife | — | Indiana |
| 75 | Carlyle Frederick | 18 | son | — | Indiana |
| 76 | Ruth Bauman | 38 | Head | Farmer | Iowa |
| 77 | Ruth Bauman | 29 | Wife | — | Indiana |
| 78 | Leland Bauman | 3 | son | — | Indiana |
| 79 | Maynard Shaffer | 28 | Head | Farmer | Indiana |
| 80 | Ruth Shaffer | 26 | Wife | — | 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)