FN
Fred Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mckenzie-County, North Dakota
Our Model Tree links this Fred Nelson across the 1920, 1930 and 1940 US Censuses in Mckenzie-County, North Dakota (XGBoost, ~Confirmed), with identified parents Otto & Lillie — first a son (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mckenzie-County, North Dakota |
| Surname | Nelson |
| Given Name | Fred |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Wilbur Twp |
| 1935 Residence (County) | McKenzie |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 52 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Occupation | Laborer |
| Township / Ward | Wilbur Twp |
| Est. Birth Year | ~1915 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Fred | Age | Birth yr |
|---|---|---|---|---|
| Harald Nelson | Son | — | 20 | ~1920 |
| Fred Nelson | Son | — | 25 | ~1915 |
| Lillie Nelson | Head | — | 47 | ~1893 |
Census Appearances
1920
Mckenzie, North …
Son, age 4
Mckenzie, North Dakota · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Fred A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Denmark |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Mckenzie, North …
Son, age 15
Mckenzie, North Dakota · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Fred A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Denmark |
| Mother's Birthplace | South Dakota |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Mckenzie-County, North …
Son, age 25
Mckenzie-County, North Dakota · implied b. ~1915 — 3 household members
| Surname | Nelson |
| Given Name | Fred |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Wilbur Twp |
| 1935 Residence (County) | McKenzie |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 60 |
| Income (1939) | 52 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Fred Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Nelson (~0.92 confidence) and mother Lillie Nelson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Nelson
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Lillie Nelson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Fred Nelson
Son · 1940 · age 25 · b. ~1915 · North Dakota
★ You are viewing this record
Sibling
Harald Nelson
Sibling · 1940 · age 20
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 — Mckenzie-County, North Dakota
Open full size
1940 US Federal Census — Mckenzie-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03006-00235)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Violet Boyce | 19 | wife | — | North Dakota |
| 42 | Audrey Boyce | 0 | daughter | — | North Dakota |
| 43 | Peter A. Hodd | 58 | head | Laborer | Sweden |
| 44 | Wilbur O. Carr | 36 | head | Laborer | Indiana |
| 45 | Albina Carr | 21 | wife | — | North Dakota |
| 46 | Donald Carr | 2 | son | — | North Dakota |
| 47 | Clara Carr | 0 | daughter | — | North Dakota |
| 48 | Ralph O. Fosby | 28 | head | Truck Driver | North Dakota |
| 49 | Agnes Fosby | 30 | wife | — | North Dakota |
| 50 | Donald Fosby | 3 | son | — | North Dakota |
| 51 | Ray W. O. Boyce | 31 | head | Farmer | North Dakota |
| 52 | Thelma Boyce | 27 | wife | — | North Dakota |
| 53 | Ann Boyce | 8 | daughter | — | North Dakota |
| 54 | Patsy Boyce | 5 | daughter | — | North Dakota |
| 55 | Rae Boyce | 3 | daughter | — | North Dakota |
| 56 | Samuel Boyce | 3 | son | — | North Dakota |
| 57 | Glenn O. Boyce | 28 | head | Equip. Operator | North Dakota |
| 58 | Dora Boyce | 21 | wife | — | North Dakota |
| 59 | Claude J. Wigley | 35 | head | Farmer | North Dakota |
| 60 | Muriel Wigley | 33 | wife | — | North Dakota |
| 61 | Dorothy Wigley | 14 | daughter | — | North Dakota |
| 62 | Muriel Clare Wigley | 12 | daughter | — | North Dakota |
| 63 | Joan Wigley | 10 | daughter | — | North Dakota |
| 64 | Janette Wigley | 8 | daughter | — | North Dakota |
| 65 | Quentin Wigley | 3 | son | — | North Dakota |
| 66 | Lillie O. Nelson | 47 | head | Farmer | South Dakota |
| 67 | Fred Nelson THIS PERSON | 25 | son | Laborer | North Dakota |
| 68 | Harald Nelson | 20 | son | Laborer | North Dakota |
| 69 | Adolph Zimmer | 50 | head | Farmer | Russia |
| 70 | Julianna Zimmer | 51 | wife | — | Russia |
| 71 | Paul Zimmer | 26 | son | Laborer | Russia |
| 72 | Awald Zimmer | 17 | son | Laborer | Oregon |
| 73 | Albert Zimmer | 13 | son | — | Montana |
| 74 | Leonard Zimmer | 10 | son | — | Montana |
| 75 | Peter M. O. Tough | 68 | head | Farmer | Canada English |
| 76 | Wallace H. O. Victory | 52 | head | Farmer | Wisconsin |
| 77 | Henry O. Kelter | 60 | head | Farmer | Germany |
| 78 | Le Roy Culdins | 17 | employee | Laborer | North Dakota |
| 79 | Charles O. Batterson | 67 | head | — | Iowa |
| 80 | Holton Jacobson | 31 | head | Diesel Operator | North Dakota |
Related Census Records
Pedigree Summary
Fred + 1 sibling
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)