WP
William Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sanpete-County, Utah
Our Model Tree links this William Peterson across the 1920, 1930 and 1940 US Censuses in Sanpete-County, Utah (XGBoost, ~Confirmed), with identified parents Jessie & Hyrum — first a son (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Male
Son
Born: Utah
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sanpete-County, Utah |
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Mt Pleasant City |
| 1935 Residence (County) | Sanpete |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail Jewelry Store |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 480 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Salesman |
| Township / Ward | Mt Pleasant City |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| Jessie Peterson | Head | — | 63 | ~1877 |
| Betty Peterson | Other | — | 18 | ~1922 |
| William Peterson | Son | — | 29 | ~1911 |
| Landell Peterson | Son | — | 24 | ~1916 |
| Melvin Peterson | Son | — | 13 | ~1927 |
| Luna Peterson | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Sanpete, Utah
Son, age 7
Sanpete, Utah · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Switzerland |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Sanpete, Utah
Son, age 18
Sanpete, Utah · implied b. ~1912 — 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 | 18 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Switzerland |
| Occupation | Laborer |
| Industry | Ore Smelter |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Sanpete-County, Utah
Son, age 29
Sanpete-County, Utah · implied b. ~1911 — 6 household members
| Surname | Peterson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Mt Pleasant City |
| 1935 Residence (County) | Sanpete |
| Occupation | Salesman |
| Industry | Retail Jewelry Store |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 480 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Jessie Peterson (~0.92 confidence) and father Hyrum Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Bertha Peterson (~0.92 confidence) and mother Luna Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jessie Peterson
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Hyrum Peterson
b. ~1880
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Bertha Peterson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Luna Peterson
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Peterson
Son · 1940 · age 29 · b. ~1911 · Utah
★ You are viewing this record
Sibling
Landell Peterson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melvin Peterson
Sibling · 1940 · age 13
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 — Sanpete-County, Utah
Open full size
1940 US Federal Census — Sanpete-County, Utah
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04217-00528)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | W. H. Thompson | 38 | Head | Laborer | Utah |
| 2 | Lenore M. Thompson | 35 | Wife | — | Utah |
| 3 | Neil Thompson | 15 | Son | — | Utah |
| 4 | Barbara Jean Thompson | 13 | Daughter | — | Utah |
| 5 | Janice Lucile Thompson | 6 | Daughter | — | Utah |
| 6 | Rosella Jacobson | 76 | Head | — | Utah |
| 7 | Burley Mcarthur | 56 | Head | Publisher | Utah |
| 8 | Stella Mcarthur | 56 | Wife | — | Utah |
| 9 | Valentine Anderson | 49 | Head | — | Utah |
| 10 | Betty V. Anderson | 16 | Daughter | — | Utah |
| 11 | Janis L. Anderson | 9 | Daughter | — | Utah |
| 12 | Glen S. Scovil | 42 | Head | — | Utah |
| 13 | Opal L. Scovil | 41 | Wife | — | Utah |
| 14 | Duane Scovil | 19 | Son | New Worker | Utah |
| 15 | Robert J. Scovil | 13 | Son | — | Utah |
| 16 | Mary Louise Scovil | 9 | Daughter | — | Utah |
| 17 | Lee Adam Seeley | 23 | Head | Electrician | Utah |
| 18 | Verda Mae Seeley | 22 | Wife | — | Utah |
| 19 | Donna Mae Seeley | 2 | Daughter | — | Utah |
| 20 | Jerold Lee Seeley | 0 | Son | — | Utah |
| 21 | Jessie M. Peterson | 63 | Head | Rock Mason | Utah |
| 22 | Luna L. Peterson | 54 | Wife | — | Utah |
| 23 | Landell Peterson | 24 | Son | Laborer | Utah |
| 24 | Melvin Peterson | 13 | Son | — | Utah |
| 25 | William Peterson THIS PERSON | 29 | Son | Salesman | Utah |
| 26 | Betty Muriel Peterson | 18 | Daughter-in-law | — | Utah |
| 27 | Leonard A. Seeley | 32 | Head | Laborer | Utah |
| 28 | Sylvia E. Seeley | 31 | Wife | — | Utah |
| 29 | Duane L. Seeley | 3 | Son | — | Utah |
| 30 | Deanza R. Seeley | 2 | Daughter | — | Utah |
| 31 | Thomas Westerbottom | 36 | Head | Farmer | Idaho |
| 32 | Iva Westerbottom | 32 | Wife | — | Idaho |
| 33 | Josephine Westerbottom | 6 | Daughter | — | Idaho |
| 34 | Thomas Westerbottom | 1 | Son | — | Utah |
| 35 | Thomas A. Christensen | 46 | Head | Butcher | Utah |
| 36 | Leah Christensen | 37 | Wife | — | Utah |
| 37 | Aleen B. Christensen | 16 | Daughter | — | Utah |
| 38 | Thuda Madge Christensen | 14 | Daughter | — | Utah |
| 39 | Jack Jean Christensen | 12 | Son | — | Utah |
Pedigree Summary
William + 2 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)