CP
Clarence Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, North Dakota
Our Model Tree links this Clarence Peterson across the 1920, 1930 and 1940 US Censuses in Mclean-County, North Dakota (XGBoost, ~Confirmed), with identified parents Theodor & Lena — first a son (b.~1909), then head of a 7-person household.
Age 31
b. ~1909
Male
Son
Born: Minnesota
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, North Dakota |
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Widowed |
| Birthplace | Minnesota |
| 1935 Residence (City) | Turtle Lake township |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Occupation | Auto Mechanic |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Auto Mechanic |
| Township / Ward | Turtle Lake Township |
| Est. Birth Year | ~1909 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Arthur Peterson | Son | — | 39 | ~1901 |
| Clarence Peterson | Son | — | 31 | ~1909 |
| Theodore Peterson | Head | — | 69 | ~1871 |
| Rachel Peterson | Daughter | — | 33 | ~1907 |
| Laura Peterson | Spouse | — | 64 | ~1876 |
| Lyone Peterson | Daughter | — | 20 | ~1920 |
| Herbert Rath | Other | — | 21 | ~1919 |
Census Appearances
1920
Mclean, North …
Son, age 11
Mclean, North Dakota · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Mclean, North …
Son, age 21
Mclean, North Dakota · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Mclean-County, North …
Son, age 31
Mclean-County, North Dakota · implied b. ~1909 — 7 household members
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Widowed |
| Birthplace | Minnesota |
| 1935 Residence (City) | Turtle Lake township |
| 1935 Residence (County) | McLean |
| Occupation | Auto Mechanic |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Clarence Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Theodor Peterson (~0.92 confidence) and mother Lena Peterson (~0.92 confidence) and mother Laura Peterson (~0.92 confidence) and mother Laura Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Theodor Peterson
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Lena Peterson
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Laura Peterson
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Laura Peterson
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Peterson
Son · 1940 · age 31 · b. ~1909 · North Dakota
★ You are viewing this record
Sibling
Arthur Peterson
Sibling · 1940 · age 39
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lyone Peterson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rachel Peterson
Sibling · 1940 · age 33
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 — Mclean-County, North Dakota
Open full size
1940 US Federal Census — Mclean-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03006-00869)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruben Sorensen | 12 | Son | — | Minnesota |
| 2 | Margaret Haugen | 29 | Daughter | Teacher | North Dakota |
| 3 | Harold Westrum | 33 | Head | Farmer | Minnesota |
| 4 | Elling Stenson | 60 | Step father | Patrolman | Iowa |
| 5 | Minnie Stenson | 51 | Mother | — | Minnesota |
| 6 | Elmer At Stenson | 22 | Brother | Attendant | North Dakota |
| 7 | Ellen At Stenson | 23 | Sister | Stenographer | North Dakota |
| 8 | Brother Burnett At | None | M | 0 | — |
| 9 | Joseph Torkelson | 46 | Head | Farmer | Minnesota |
| 10 | Bertha Torkelson | 39 | Wife | — | Minnesota |
| 11 | Ernest At Torkelson | 15 | Son | — | North Dakota |
| 12 | Joyce Torkelson | 9 | Daughter | — | North Dakota |
| 13 | Gordon Torkelson | 7 | Son | — | North Dakota |
| 14 | Edwin Brevig | 27 | Head | Farmer | Minnesota |
| 15 | Harda Brevig | 27 | Wife | — | North Dakota |
| 16 | Theodore Peterson | 69 | Head | Farmer | Minnesota |
| 17 | Laura Peterson | 64 | Wife | — | Minnesota |
| 18 | Arthur Peterson | 39 | Son | Auto Mechanic | Minnesota |
| 19 | Rachel Peterson | 33 | Daughter | Auto Mechanic | Minnesota |
| 20 | Clarence Peterson THIS PERSON | 31 | Son | Auto Mechanic | Minnesota |
| 21 | Lyone Peterson | 20 | Daughter | — | North Dakota |
| 22 | Herbert Rath | 21 | Hired Hand | Farm Labor | North Dakota |
| 23 | Elmer Carr | 39 | Head | Farmer | Minnesota |
| 24 | Alma Carr | 33 | Wife | — | Minnesota |
| 25 | Betty Carr | 10 | Daughter | — | North Dakota |
| 26 | Marlan Carr | 7 | Daughter | — | North Dakota |
| 27 | Joann Carr | 6 | Daughter | — | North Dakota |
| 28 | Irona Carr | 2 | Daughter | — | North Dakota |
| 29 | Audrey Carr | 0 | Daughter | — | North Dakota |
| 30 | Blanche Carr | 69 | Mother | — | Minnesota |
| 31 | Leroy Hanson | 9 | Nephew | — | North Dakota |
| 32 | William Carr | 38 | Head | Farmer | Minnesota |
| 33 | Elsie Carr | 36 | Wife | — | North Dakota |
| 34 | Marlys Carr | 6 | Daughter | — | North Dakota |
| 35 | Myron Carr | 4 | Son | — | North Dakota |
| 36 | Calvin Carr | 2 | Son | — | North Dakota |
| 37 | Palmer Sanderson | 39 | Head | Farmer | Minnesota |
| 38 | Bertha Sanderson | 31 | Wife | — | Minnesota |
| 39 | Clarice Sanderson | 10 | Daughter | — | North Dakota |
| 40 | Lois Sanderson | 9 | Daughter | — | North Dakota |
Pedigree Summary
Clarence + 3 siblings
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)