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Mary Heller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Williams-County, North Dakota
Our Model Tree links this Mary Heller across the 1930 and 1940 US Censuses in Williams-County, North Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 7-person household.
Age 47
b. ~1893
Female
Spouse
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Williams-County, North Dakota |
| Surname | Heller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Round Prairie |
| 1935 Residence (County) | Williams |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Township / Ward | Round Prairie |
| Est. Birth Year | ~1893 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sylvia Heller | Daughter | — | 24 | ~1916 |
| Joyce Heller | Daughter | — | 4 | ~1936 |
| Mary Heller | Spouse | — | 47 | ~1893 |
| Ruth Heller | Daughter | — | 12 | ~1928 |
| Borghild Heller | Daughter | — | 15 | ~1925 |
| John Heller | Head | — | 57 | ~1883 |
| Edwin Heller | Son | — | 23 | ~1917 |
Census Appearances
1930
Williams, North …
Spouse, age 37
Williams, North Dakota · implied b. ~1893 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Heller |
| Given Name | Mary C |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Alien |
| Year of Immigration | 1913 |
| Age at First Marriage | 22 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Williams-County, North …
Spouse, age 47
Williams-County, North Dakota · implied b. ~1893 — 7 household members
| Surname | Heller |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Round Prairie |
| 1935 Residence (County) | Williams |
| Naturalization Status | Alien |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 Heller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Heller
Spouse · 1940 · age 47 · b. ~1893 · North Dakota
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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 — Williams-County, North Dakota
Open full size
1940 US Federal Census — Williams-County, North Dakota
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03018-00676)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jamie R Amlstad | Amstad | 3 | Son | — | North Dakota |
| 42 | Coshera Johnson | 54 | Head | Farmer | Wisconsin |
| 43 | Josephine Johnson | 58 | Wife | — | Wisconsin |
| 44 | Wayne Johnson | 14 | Son | — | North Dakota |
| 45 | Clarence Anderson | 30 | Head | Farmer | North Dakota |
| 46 | Mary S Anderson | 25 | Wife | — | North Dakota |
| 47 | Duane W Anderson | 5 | Son | — | North Dakota |
| 48 | Jane E Anderson | 3 | Daughter | — | North Dakota |
| 49 | Glenn A Anderson | 2 | Son | — | North Dakota |
| 50 | Ernest B Anderson | 0 | Son | — | North Dakota |
| 51 | Swan Anderson | 59 | Father | — | Sweden |
| 52 | Thomas A Mctoy | Mccoy | 57 | Head | Farmer | Iowa |
| 53 | Oscar J Carlson | 58 | Head | Farmer | Sweden |
| 54 | Josephine M Carlson | 57 | Wife | — | Minnesota |
| 55 | Ole Stothaug | 67 | Head | Farmer | Norway |
| 56 | Hilda Stothaug | 57 | Wife | — | Norway |
| 57 | Marie Stothaug | 15 | Daughter | — | North Dakota |
| 58 | John R Scorsch | 34 | Head | Farmer | North Dakota |
| 59 | Irene G Scorsch | 27 | Wife | — | North Dakota |
| 60 | Arlene G Scorsch | 1 | Daughter | — | North Dakota |
| 61 | Sherda Roscher | 60 | Head | Farm Laborer | Missouri |
| 62 | Clifford Ohlse | 25 | Head | Student | North Dakota |
| 63 | Ruth Ohlse | 25 | Wife | Teacher | North Dakota |
| 64 | John Heller | 57 | Head | Farmer | Norway |
| 65 | Mary Heller THIS PERSON | 47 | Wife | — | Norway |
| 66 | Sylvia Heller | 24 | Daughter | Maid | North Dakota |
| 67 | Edwin Heller | 23 | Son | Trucker | North Dakota |
| 68 | Borghild Heller | 15 | Daughter | — | North Dakota |
| 69 | Ruth Heller | 12 | Daughter | — | North Dakota |
| 70 | Joyce Heller | 4 | Daughter | — | North Dakota |
| 71 | Ludvig R Hoganson | 54 | Head | Farmer | Minnesota |
| 72 | Martin P Clyne | 56 | Head | Farmer | Iowa |
| 73 | Louise Clyne | 47 | Wife | — | North Dakota |
| 74 | Harold E Clyne | 20 | Son | Farm Laborer | North Dakota |
| 75 | Ralph L Clyne | 18 | Son | Bakers Assistant | North Dakota |
| 76 | Lloyd M Clyne | 16 | Son | — | North Dakota |
| 77 | Audrey L Clyne | 14 | Daughter | — | North Dakota |
| 78 | Marilyn Clyne | 10 | Son | — | North Dakota |
| 79 | Jerold Clyne | 8 | Son | — | North Dakota |
Related Census Records
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)