JH
John Hartman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sioux-County, North Dakota
Our Model Tree links this John Hartman across the 1920, 1930 and 1940 US Censuses in Sioux-County, North Dakota (XGBoost, ~Confirmed), with identified parents Fabian & Sinfrosa — first a head (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Head
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sioux-County, North Dakota |
| Surname | Hartman |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Twp 129 R 81 |
| 1935 Residence (County) | Sioux |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Occupation | Farmer |
| Township / Ward | Twp 129 R 81 |
| Est. Birth Year | ~1904 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Agena Hartman | Daughter | — | 5 | ~1935 |
| John Hartman | Head | — | 36 | ~1904 |
| Joseph Hartman | Son | — | 4 | ~1936 |
| Edwin Hartman | Son | — | 9 | ~1931 |
| Emma Hartman | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Grant, North …
Son, age 15
Grant, North Dakota · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Russia |
| Year of Immigration | 1908 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Farm helper |
| Industry | Home farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Mother Tongue | German |
| Birth Country | Russia |
| Year of Naturalization | 1914 |
| Birthplace (normalized) | russia |
1930
Grant, North …
Head, age 26
Grant, North Dakota · implied b. ~1904 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1909 |
| Age at First Marriage | 26 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Sioux-County, North …
Head, age 36
Sioux-County, North Dakota · implied b. ~1904 — 5 household members
| Surname | Hartman |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Twp 129 R 81 |
| 1935 Residence (County) | Sioux |
| Naturalization Status | Naturalized |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 Hartman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Fabian Hartman (~0.92 confidence) and mother Sinfrosa Hartman (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fabian Hartman
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Sinfrosa Hartman
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hartman
Head · 1940 · age 36 · b. ~1904 · North 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 — Sioux-County, North Dakota
Open full size
1940 US Federal Census — Sioux-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03013-00295)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rudolph Settich | 28 | Head | Farmer | South Dakota |
| 2 | Lucille Settich | 27 | Wife | — | South Dakota |
| 3 | Harold W. Settich | 1 | Son | — | South Dakota |
| 4 | Andrew Bertsch | 32 | Head | Farmer | South Dakota |
| 5 | Anna Bertsch | 27 | Wife | — | South Dakota |
| 6 | Betty J. Bertsch | 5 | Daughter | — | South Dakota |
| 7 | Curtis H. Bertsch | 3 | Son | — | North Dakota |
| 8 | Andrew Sandland | 36 | Head | Farmer | North Dakota |
| 9 | Pauline Sandland | 32 | Wife | — | North Dakota |
| 10 | Bernice Sandland | 9 | Daughter | — | North Dakota |
| 11 | Eddie Sandland | 7 | Son | — | North Dakota |
| 12 | Audrey Sandland | 5 | Son | — | North Dakota |
| 13 | Doris Sandland | 3 | Daughter | — | North Dakota |
| 14 | Jane Sandland | 1 | Daughter | — | North Dakota |
| 15 | Richard Gordon | 22 | Head | Farmer | South Dakota |
| 16 | Lena Gordon | 18 | Wife | — | South Dakota |
| 17 | Christ Biert | 55 | Head | Farmer | Denmark |
| 18 | Clarence Sandland | 25 | Head | Farmer | South Dakota |
| 19 | Richard Sandland | 20 | Son | Farm Laborer | North Dakota |
| 20 | Charles F. Becker | 55 | Head | Farmer | South Dakota |
| 21 | George Schaeffer | 36 | Head | Farmer | Missouri |
| 22 | Eva Schaeffer | 32 | Wife | — | North Dakota |
| 23 | Gloria Schaeffer | 10 | Daughter | — | North Dakota |
| 24 | Donald Schaeffer | 8 | Son | — | North Dakota |
| 25 | Anton Schaeffer | 7 | Son | — | North Dakota |
| 26 | Verna Schaeffer | 1 | Daughter | — | North Dakota |
| 27 | John G. Hartman THIS PERSON | 36 | Head | Farmer | Russia |
| 28 | Emma Hartman | 31 | Wife | — | North Dakota |
| 29 | Edwin Hartman | 9 | Son | — | North Dakota |
| 30 | Agena Hartman | 5 | Daughter | — | North Dakota |
| 31 | Joseph Hartman | 4 | Son | — | North Dakota |
| 32 | Olaf Sandland | 45 | Head | Farmer | North Dakota |
| 33 | Clara Sandland | 46 | Wife | — | South Dakota |
| 34 | Lola Sandland | 21 | Daughter | — | North Dakota |
| 35 | Lormer Sandland | 16 | Son | — | North Dakota |
| 36 | George Uhlman | 68 | Head | Farmer | Germany |
| 37 | Anton Kraft | 66 | Head | Farmer | Russia |
| 38 | Walburga Kraft | 58 | Wife | — | Russia |
| 39 | John Kraft | 23 | Son | Farm Laborer | North Dakota |
| 40 | Audrey Kraft | 20 | Son | Farm Laborer | North 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)