ET
Elmer Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cavalier-County, North Dakota
Our Model Tree links this Elmer Thompson across the 1920, 1930 and 1940 US Censuses in Cavalier-County, North Dakota (XGBoost, ~Confirmed), with identified parents Benson & Byron — first a head (b.~1906), then head of a 4-person household.
Age 34
b. ~1906
Male
Head
Born: North Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cavalier-County, North Dakota |
| Surname | Thompson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | Algo Village |
| 1935 Residence (County) | Cavalier |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Occupation | Farmer |
| Township / Ward | Algo Village |
| Est. Birth Year | ~1906 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Elmer | Age | Birth yr |
|---|---|---|---|---|
| Elmer Thompson | Head | — | 34 | ~1906 |
| Kenneth Thompson | Son | — | 5 | ~1935 |
| Gerald Thompson | Son | — | 1 | ~1939 |
| Lucille Thompson | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Cavalier, North …
Son, age 13
Cavalier, North Dakota · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Canada |
| Mother's Birthplace | North Dakota |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Cavalier, North …
Son, age 24
Cavalier, North Dakota · implied b. ~1906 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | North Dakota |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Cavalier-County, North …
Head, age 34
Cavalier-County, North Dakota · implied b. ~1906 — 4 household members
| Surname | Thompson |
| Given Name | Elmer |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | Algo Village |
| 1935 Residence (County) | Cavalier |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north 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 Elmer Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Benson Thompson (~0.92 confidence) and father Byron Thompson (~0.92 confidence) and mother Eleanor Thompson (~0.92 confidence) and mother Lenora Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Benson Thompson
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Byron Thompson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Eleanor Thompson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lenora Thompson
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Elmer Thompson
Head · 1940 · age 34 · b. ~1906 · 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 — Cavalier-County, North Dakota
Open full size
1940 US Federal Census — Cavalier-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02998-00388)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Veronica Deneault | 8 | daughter | — | North Dakota |
| 42 | Gloria Deneault | 3 | daughter | — | North Dakota |
| 43 | Elmer Thompson THIS PERSON | 34 | Head | Farmer | North Dakota |
| 44 | Lucille Thompson | 26 | Wife | Housewife | North Dakota |
| 45 | Kenneth Thompson | 5 | son | — | North Dakota |
| 46 | Gerald Thompson | 1 | son | — | North Dakota |
| 47 | Minnie Hoff | 55 | Head | — | North Dakota |
| 48 | Howard Hoff | 21 | son | Farmer | North Dakota |
| 49 | Harvey Hoff | 17 | son | Farmer | North Dakota |
| 50 | Sarah Barry | 61 | Head | — | Canada |
| 51 | John Cleary | 29 | Hired hand | Farm Labor | N. Dakota |
| 52 | A. J. Gariepy | 59 | Head | Laborer | N. Dakota |
| 53 | Arlia Gariepy | 22 | daughter | Housewife | North Dakota |
| 54 | George Renault | 24 | Head | Laborer | North Dakota |
| 55 | — | None | — | — | — |
| 56 | Arthur Plante | 54 | Head | Farmer | North Dakota |
| 57 | Louise Plante | 48 | Wife | — | North Dakota |
| 58 | Romeo Plante | 26 | son | Farm Labor | North Dakota |
| 59 | Harvey Plante | 23 | son | Farm Labor | North Dakota |
| 60 | Irene Plante | 20 | daughter | — | North Dakota |
| 61 | Dorama Plante | 15 | daughter | — | North Dakota |
| 62 | Helen Plante | 8 | daughter | — | North Dakota |
| 63 | Jane Plante | 5 | daughter | — | North Dakota |
| 64 | June Plante | 5 | daughter | — | North Dakota |
| 65 | William Gaudreau | 58 | Head | Salesman | New Canada |
| 66 | Aldea Gaudreau | 55 | Wife | — | Canada French |
| 67 | Edna Gaudreau | 22 | daughter | — | North Dakota |
| 68 | John Thielbar | 46 | Head | Truck Driver | Kansas |
| 69 | Isabella Thielbar | 25 | Wife | — | North Dakota |
| 70 | Robert Thielbar | 6 | son | — | North Dakota |
| 71 | Noel Robillard | 77 | Head | Rural Merchant | Canada French |
| 72 | Mary P. Robillard | 67 | Wife | Assistant P. Master | Canada |
| 73 | Henry J. Beauchamp | 49 | Head | Post Master | North Dakota |
| 74 | Bertha Beauchamp | 47 | Wife | — | Canada French |
| 75 | Rachael Beauchamp | 17 | daughter | — | North Dakota |
| 76 | Jacqueline Beauchamp | 15 | daughter | — | North Dakota |
| 77 | Jeanette Beauchamp | 14 | daughter | — | North Dakota |
| 78 | Theresa Beauchamp | 9 | daughter | — | North Dakota |
| 79 | Archie Dumas | 27 | Head | Farm Labor | North Dakota |
| 80 | Yvonne Dumas | 29 | Wife | — | North Dakota |
Related Census Records
Pedigree Summary
Elmer
Gen 1 · 4 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)