WP
William Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Roosevelt-County, Montana
Our Model Tree links this William Peterson across the 1920, 1930 and 1940 US Censuses in Roosevelt-County, Montana (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Roosevelt-County, Montana |
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Township 29 School Dist. 14 |
| 1935 Residence (County) | Roosevelt |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Income (1939) | 216 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Occupation | Laborer |
| Township / Ward | Township 29 School Dist 14 |
| Est. Birth Year | ~1914 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Minnie Peterson | Daughter | — | 24 | ~1916 |
| John Peterson | Head | — | 58 | ~1882 |
| Ernest Peterson | Son | — | 20 | ~1920 |
| Reuben Peterson | Son | — | 17 | ~1923 |
| William Peterson | Son | — | 26 | ~1914 |
| Mamie Peterson | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Roosevelt, Montana
Son, age 6
Roosevelt, Montana · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Roosevelt, Montana
Son, age 16
Roosevelt, Montana · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | Labor |
| Industry | Father's Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Roosevelt-County, Montana
Son, age 26
Roosevelt-County, Montana · implied b. ~1914 — 6 household members
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Township 29 School Dist. 14 |
| 1935 Residence (County) | Roosevelt |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 48 |
| Income (1939) | 216 |
| Highest Grade | No 7 |
| 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 William Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Minnie Peterson (~0.92 confidence) and mother Mamie Peterson (~0.92 confidence) and mother Mary Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Peterson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Minnie Peterson
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mamie Peterson
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Mary Peterson
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Peterson
Son · 1940 · age 26 · b. ~1914 · Montana
★ You are viewing this record
Sibling
Reuben Peterson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Peterson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Minnie Peterson
Sibling · 1940 · age 24
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 — Roosevelt-County, Montana
Open full size
1940 US Federal Census — Roosevelt-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02228-00617)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Christie Picard | 49 | Head | Farmer | Canada French |
| 2 | Lavern Picard | 25 | Son | Farm Laborer | Montana |
| 3 | Gladys Picard | 21 | Son | Farm Laborer | Montana |
| 4 | W. G. Suter | 62 | Head | Farmer | Nebraska |
| 5 | Marie Suter | 53 | Wife | — | Nebraska |
| 6 | Kenneth Suter | 19 | Son | Laborer | Texas |
| 7 | Wallace Jos Suter | 15 | Son | — | Texas |
| 8 | Mary Picard | 47 | Head | Farmer | Canada French |
| 9 | Edward Kerr | 71 | Head | Farmer | Wisconsin |
| 10 | Mattie Kerr | 62 | Wife | — | Wisconsin |
| 11 | Evan Kerr | 33 | Son | — | Wisconsin |
| 12 | James Vandeburg | 35 | Head | Farmer | North Dakota |
| 13 | Bernice Vandeburg | 25 | Wife | — | North Dakota |
| 14 | Glen Vandeburg | 10 | Son | — | Montana |
| 15 | Ray Vandeburg | 8 | Son | — | Montana |
| 16 | Vandeburg | 4 | Daughter | — | Montana |
| 17 | George Vandeburg | 37 | Head | Farmer | North Dakota |
| 18 | Clara Vandeburg | 37 | Wife | — | Montana |
| 19 | George J. Vandeburg | 10 | Son | — | Montana |
| 20 | Florence Vandeburg | 6 | Daughter | — | Montana |
| 21 | Laura Vandeburg | 2 | Daughter | — | Montana |
| 22 | Patricia Vandeburg | 1 | Daughter | — | Montana |
| 23 | Clement Jr. Holly | 16 | Lodger | — | Montana |
| 24 | John Peterson | 58 | Head | Farmer | Minnesota |
| 25 | Mamie Peterson | 45 | Wife | — | Minnesota |
| 26 | William Peterson THIS PERSON | 26 | Son | Laborer | North Dakota |
| 27 | Minnie Peterson | 24 | Daughter | — | North Dakota |
| 28 | Ernest Peterson | 20 | Son | Laborer | Montana |
| 29 | Reuben Peterson | 17 | Son | Laborer | Montana |
| 30 | Charles Sands | 55 | Head | Farmer | Minnesota |
| 31 | Alina Sands | 27 | Daughter | — | Kentucky |
| 32 | Lynn Yochem | 61 | Head | Farmer | Norway |
| 33 | Ingeborg Yochem | 55 | Wife | — | Norway |
| 34 | Peter Eschenbacher | 54 | Head | Farmer | Nebraska |
| 35 | Bebra Eschenbacher | 52 | Wife | — | Maryland |
| 36 | Betty Lou Eschenbacher | 8 | Niece | — | Montana |
| 37 | William Eschenbacher | 33 | Head | Farmer | North Dakota |
| 38 | Violet Eschenbacher | 29 | Wife | — | North Dakota |
| 39 | Kenneth Eschenbacher | 6 | Son | — | Montana |
| 40 | Dale Eschenbacher | 3 | Son | — | North Dakota |
Pedigree Summary
William + 3 siblings
Gen 1 · 5 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)