AJ
Alvin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mountrail-County, North Dakota
Our Model Tree links this Alvin Johnson across the 1920, 1930 and 1940 US Censuses in Mountrail-County, North Dakota (XGBoost, ~Confirmed), with identified parents Andrew & Andrew — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mountrail-County, North Dakota |
| Surname | Johnson |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Mountrail |
| 1935 Residence (County) | Mountrail |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | North Dakota |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | Stanley City |
| Est. Birth Year | ~1918 |
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 Alvin | Age | Birth yr |
|---|---|---|---|---|
| Rudolph Johnson | Son | — | 19 | ~1921 |
| Selma Johnson | Daughter | — | 16 | ~1924 |
| Alvin Johnson | Son | — | 22 | ~1918 |
| Joseph Johnson | Head | — | 54 | ~1886 |
| Tonette Johnson | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Mountrail, North …
Son, age 2
Mountrail, North Dakota · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Mountrail, North …
Son, age 12
Mountrail, North Dakota · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Mountrail-County, North …
Son, age 22
Mountrail-County, North Dakota · implied b. ~1918 — 5 household members
| Surname | Johnson |
| Given Name | Alvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Mountrail |
| 1935 Residence (County) | Mountrail |
| Highest Grade | No 8 |
| 1935 Residence | North Dakota |
| 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 Alvin Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Andrew Johnson (~0.92 confidence) and father Andrew Johnson (~0.92 confidence) and father Joseph Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence) and mother Tonette Johnson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Andrew Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Andrew Johnson
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Joseph Johnson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Tonette Johnson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Alvin Johnson
Son · 1940 · age 22 · b. ~1918 · North Dakota
★ You are viewing this record
Sibling
Rudolph Johnson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Selma Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mountrail-County, North Dakota
Open full size
1940 US Federal Census — Mountrail-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03008-00324)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Adeline Querne | 13 | Daughter | — | North Dakota |
| 2 | Lyle Querne | 12 | Daughter | — | North Dakota |
| 3 | John Querne | 11 | Son | — | North Dakota |
| 4 | Vernon Querne | 8 | Son | — | North Dakota |
| 5 | Harlan Querne | 2 | Son | — | North Dakota |
| 6 | Arvid Querne | 1 | Son | — | North Dakota |
| 7 | Joseph A. Johnson | 54 | Head | Labor | Minnesota |
| 8 | Tonette Johnson | 48 | Wife | — | North Dakota |
| 9 | Alvin Johnson THIS PERSON | 22 | Son | — | North Dakota |
| 10 | Rudolph Johnson | 19 | Son | Salesman | North Dakota |
| 11 | Selma Johnson | 16 | Daughter | Farmer | North Dakota |
| 12 | Francis B. Miller | 38 | Head | New Worker | North Dakota |
| 13 | Myrtle Miller | 37 | Wife | Telegrapher | North Dakota |
| 14 | Donald B. Miller | 16 | Son | — | North Dakota |
| 15 | Robert E. Miller | 4 | Son | — | North Dakota |
| 16 | Henry Carlson | 66 | Head | Farmer | Minnesota |
| 17 | Marie E. Carlson | 60 | Wife | — | Wisconsin |
| 18 | Clyde E. Carlson | 31 | Son | Mechanic | North Dakota |
| 19 | J. Hoppen | 27 | Lodger | Instructor | North Dakota |
| 20 | Jennie Sennit | 30 | Lodger | Waitress | North Dakota |
| 21 | Robert G. Rollin | 34 | Lodger | Clerk | North Dakota |
| 22 | John Iverson | 75 | Lodger | — | Norway |
| 23 | Perry H. Colvert | 53 | Head | Employee | Missouri |
| 24 | Esther Colvert | 48 | Wife | — | Minnesota |
| 25 | Howard G. Colvert | 27 | Son | Meat Cutter | North Dakota |
| 26 | John Colvert | 19 | Son | Salesman | North Dakota |
| 27 | Thomas Colvert | 4 | Son | — | North Dakota |
| 28 | Edward D. Hadley | 47 | Head | Employee | Michigan |
| 29 | Frances Hadley | 40 | Wife | — | North Dakota |
| 30 | John D. Thompson | 66 | Head | Proprietor | Wisconsin |
| 31 | Olga Thompson | 56 | Wife | — | Norway |
| 32 | Genevieve Thompson | 12 | Daughter | — | North Dakota |
| 33 | Albert H. Arntson | 32 | Head | County Superintendent | North Dakota |
| 34 | Selma H. Arntson | 29 | Wife | — | North Dakota |
| 35 | Richard A. Arntson | 3 | Son | — | North Dakota |
| 36 | Donald N. Arntson | 1 | Son | — | North Dakota |
| 37 | Bernhard C. Peterson | 27 | Head | Alt. Salesman | North Dakota |
| 38 | Anna Peterson | 27 | Wife | Sales Lady | Minnesota |
| 39 | George M. Fitzpatrick | 38 | Head | Employee | Minnesota |
| 40 | Ellen Fitzpatrick | 37 | Wife | — | Minnesota |
Pedigree Summary
Alvin + 2 siblings
Gen 1 · 6 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)