RP
Robert Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Robert Peterson across the 1920, 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed), with identified parents Clarence & Irene — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Peterson |
| Given Name | Robert R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Hours Worked | 44 |
| Income (1939) | 7560 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1919 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Clarence Peterson | Head | — | 50 | ~1890 |
| Leora Childs | Other | — | 19 | ~1921 |
| John Peterson | Son | — | 9 | ~1931 |
| Robert Peterson | Son | — | 21 | ~1919 |
| Irene Peterson | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Salt Lake, …
Son, age 1
Salt Lake, Utah · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Salt Lake, …
Son, age 11
Salt Lake, Utah · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Robert R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Utah |
| Age at First Marriage | 11 |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Salt-Lake-County, Utah
Son, age 21
Salt-Lake-County, Utah · implied b. ~1919 — 5 household members
| Surname | Peterson |
| Given Name | Robert R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Hours Worked | 44 |
| Income (1939) | 7560 |
| Highest Grade | Hs 2 |
| 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 Robert Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clarence Peterson (~0.92 confidence) and mother Irene Peterson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clarence Peterson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Irene Peterson
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Peterson
Son · 1940 · age 21 · b. ~1919 · Utah
★ You are viewing this record
Sibling
John Peterson
Sibling · 1940 · age 9
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 — Salt-Lake-County, Utah
Open full size
1940 US Federal Census — Salt-Lake-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04223-00398)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Schramm | 17 | Daughter | — | Utah |
| 42 | Clarence J. Peterson | 50 | Head | Mechanical Engineer | Utah |
| 43 | Irene R. Peterson | 46 | Wife | Mechanic | Utah |
| 44 | Robert R. Peterson THIS PERSON | 21 | Son | — | Utah |
| 45 | John G. Peterson | 9 | Son | — | Utah |
| 46 | Leora Childs | 19 | Maid | Maid | Utah |
| 47 | Grant L. Crandall | 41 | Head | Vice President | Utah |
| 48 | Golda B. Crandall | 41 | Wife | — | Utah |
| 49 | Mae B. Crandall | 18 | Sister | — | Utah |
| 50 | Norma J. Crandall | 16 | Daughter | — | Utah |
| 51 | Ruth Crandall | 15 | Daughter | — | Utah |
| 52 | John H. Crandall | 4 | Son | — | Utah |
| 53 | Joseph E. Webb | 53 | Head | Collector | Utah |
| 54 | Mary N. Webb | 48 | Wife | — | Scotland |
| 55 | Hazel Webb | 23 | Daughter | Dial Operator | Utah |
| 56 | Helen R. Webb | 19 | Daughter | — | Utah |
| 57 | Mary J. Webb | 16 | Daughter | — | Utah |
| 58 | Louise Cullimore | 33 | Head | Fur Sewing | Utah |
| 59 | Marilyn Cullimore | 11 | Daughter | — | Utah |
| 60 | Dennis O. Johnson | 41 | Head | Salesman | Iowa |
| 61 | Helen E. Johnson | 42 | Wife | — | Iowa |
| 62 | Dennis F. Johnson | 18 | Son | Waiter Soda Fountain | Iowa |
| 63 | Norma R. Johnson | 15 | Daughter | — | Iowa |
| 64 | Robert R. Johnson | 13 | Son | — | Iowa |
| 65 | John P. Backman | 58 | Head | Locomotive Engineer | Utah |
| 66 | Nellie O. Backman | 53 | Wife | — | California |
| 67 | Marlene M. Backman | 17 | Daughter | Saleslady | Utah |
| 68 | Donna J. Backman | 16 | Daughter | — | Utah |
| 69 | Hazel B. Thomas | 31 | Daughter | Canvassing | Utah |
| 70 | Charles M. Ruff | 31 | Head | Salesman | Utah |
| 71 | Claudia P. Ruff | 32 | Wife | — | Nevada |
| 72 | Charles R. Ruff | 6 | Son | — | Utah |
| 73 | Patricia A. Ruff | 4 | Daughter | — | Utah |
| 74 | Bernard Brockbank | 30 | Head | Inspector Aero Navigation | Utah |
| 75 | Nada R. Brockbank | 25 | Wife | — | Idaho |
| 76 | Loren R. Brockbank | 3 | Son | — | D.C. |
| 77 | Bernard P. Brockbank | 1 | Son | — | Utah |
| 78 | Infant Brockbank | 0 | Daughter | — | Utah |
| 79 | Joseph J. Fraser | 44 | Head | Major | Iowa |
| 80 | Helen W. Fraser | 42 | Wife | — | Iowa |
Pedigree Summary
Robert + 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)