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John Keller — 1940 US Census Record
Model Tree available1940 United States Federal Census · Turner-County, South Dakota
Our Model Tree links this John Keller across the 1920, 1930 and 1940 US Censuses in Turner-County, South Dakota (XGBoost, ~Confirmed), with identified parents Maria & Jacob — first a head (b.~1901), then head of a 12-person household.
Age 39
b. ~1901
Male
Head
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Turner-County, South Dakota |
| Surname | Keller |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Turner |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Farmer |
| Township / Ward | Parker |
| Est. Birth Year | ~1901 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Keller | Daughter | — | 1 | ~1939 |
| Dana Keller | Daughter | — | 2 | ~1938 |
| Geraldine Keller | Daughter | — | 11 | ~1929 |
| Shirley Keller | Daughter | — | 4 | ~1936 |
| John Keller | Head | — | 39 | ~1901 |
| John Finley | Other | — | 62 | ~1878 |
| Duane Keller | Son | — | 9 | ~1931 |
| Dennis Keller | Son | — | 5 | ~1935 |
| Dale Keller | Son | — | 13 | ~1927 |
| John Keller | Son | — | 14 | ~1926 |
| Marlyn Keller | Son | — | 10 | ~1930 |
| Maxine Keller | Spouse | — | 32 | ~1908 |
Census Appearances
1920
Turner, South …
Son, age 18
Turner, South Dakota · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keller |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Turner, South …
Head, age 27
Turner, South Dakota · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kuller |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 26 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Turner-County, South …
Head, age 39
Turner-County, South Dakota · implied b. ~1901 — 12 household members
| Surname | Keller |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Turner |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Keller across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Maria Keller (~0.92 confidence) and father Jacob Keller (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Maria Keller
b. ~1863
Source mother
● Household
· direct · ~0.92
Father
Jacob Keller
b. ~1869
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Keller
Head · 1940 · age 39 · b. ~1901 · South Dakota
★ 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 — Turner-County, South Dakota
Open full size
1940 US Federal Census — Turner-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03868-01066)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Herby J Jensen | 46 | Head | Farmer | Illinois |
| 42 | Lilly H Jensen | 45 | Wife | — | South Dakota |
| 43 | Ray R Jensen | 11 | Son | — | South Dakota |
| 44 | Lawrence E Jacobsen | 40 | Head | Farmer | Illinois |
| 45 | Vada N Jacobsen | 31 | Wife | — | Iowa |
| 46 | Craig M Jacobsen | 11 | Son | — | South Dakota |
| 47 | Lawrence Jr Jacobsen | 10 | Son | — | South Dakota |
| 48 | Robert F Jacobsen | 10 | Son | — | South Dakota |
| 49 | Leo L Jacobsen | 8 | Daughter | — | South Dakota |
| 50 | Mary E Jacobsen | 6 | Daughter | — | South Dakota |
| 51 | Sonja J Jacobsen | 3 | Daughter | — | South Dakota |
| 52 | John H Keller THIS PERSON | 39 | Head | Farmer | South Dakota |
| 53 | Maxine H Keller | 32 | Wife | — | South Dakota |
| 54 | John Jr Keller | 14 | Son | — | South Dakota |
| 55 | Dale R Keller | 13 | Son | — | South Dakota |
| 56 | Geraldine A Keller | 11 | Daughter | — | South Dakota |
| 57 | Marlyn F Keller | 10 | Son | — | South Dakota |
| 58 | Duane N Keller | 9 | Son | — | South Dakota |
| 59 | Dennis E Keller | 5 | Son | — | South Dakota |
| 60 | Shirley L Keller | 4 | Daughter | — | South Dakota |
| 61 | Dana Ray Keller | 2 | Daughter | — | South Dakota |
| 62 | Patricia J Keller | 1 | Daughter | — | South Dakota |
| 63 | John Finley | 62 | Father-in-law | Salesman | Illinois |
| 64 | Torris Voagen | 71 | Head | Farmer | Norway |
| 65 | Ingeborg Voagen | 71 | Wife | — | Norway |
| 66 | Thomas Nelson | 51 | Head | Farmer | Norway |
| 67 | Thomas Voagen | 54 | Head | Farmer | Norway |
| 68 | Elizabeth S Voagen | 53 | Wife | — | Norway |
| 69 | Arthur T Voagen | 30 | Son | Laborer | South Dakota |
| 70 | Noble T Voagen | 26 | Son | Laborer | South Dakota |
| 71 | Curtis C Blundell | 43 | Head | Farmer | South Dakota |
| 72 | Helen T Blundell | 41 | Wife | — | Minnesota |
| 73 | Melyn E Blundell | 20 | Son | Janitor | South Dakota |
| 74 | Frederick C Blundell | 18 | Son | — | South Dakota |
| 75 | Richard E Blundell | 13 | Son | — | South Dakota |
| 76 | Joan Blundell | 5 | Daughter | — | South Dakota |
| 77 | Martin Bartles | 51 | Head | Farmer | South Dakota |
| 78 | Minnie Bartles | 40 | Wife | — | South Dakota |
| 79 | Harm Bartles | 24 | Son | Farm | South Dakota |
| 80 | Irene Bartles | 19 | Daughter | — | South Dakota |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)