RC
Robert Caldwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Robert Caldwell across the 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 9-person household.
Age 18
b. ~1922
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Caldwell |
| Given Name | Robert D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Murray City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Occupation | Laborer |
| Industry | Fence Construction |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 180 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Laborer |
| Township / Ward | Murray City |
| Est. Birth Year | ~1922 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Donna Caldwell | Daughter | — | 16 | ~1924 |
| William Caldwell | Son | — | 14 | ~1926 |
| Erman Caldwell | Daughter | — | 10 | ~1930 |
| Larry Caldwell | Son | — | 1 | ~1939 |
| Vivian Caldwell | Daughter | — | 4 | ~1936 |
| Robert Caldwell | Son | — | 18 | ~1922 |
| Richard Caldwell | Son | — | 8 | ~1932 |
| Elizabeth Caldwell | Spouse | — | 39 | ~1901 |
| Robert Caldwell | Head | — | 41 | ~1899 |
Census Appearances
1930
Salt Lake, …
Son, age 8
Salt Lake, Utah · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Caldwell |
| Given Name | Robert D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Salt-Lake-County, Utah
Son, age 18
Salt-Lake-County, Utah · implied b. ~1922 — 9 household members
| Surname | Caldwell |
| Given Name | Robert D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Murray City |
| 1935 Residence (County) | Salt Lake |
| Occupation | Laborer |
| Industry | Fence Construction |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 180 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 Caldwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Caldwell
Son · 1940 · age 18 · b. ~1922 · Utah
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Sibling
Donna Caldwell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Caldwell
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Caldwell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Caldwell
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Erman Caldwell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Larry Caldwell
Sibling · 1940 · age 1
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
39 people indexed on this census page (nara:1940:m-t0627-04216-00765)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Fern Ockey | 4 | Daughter | — | Utah |
| 42 | Darlene Ockey | 1 | Daughter | — | Utah |
| 43 | Lilly A Elkins | 45 | Head | — | Colorado |
| 44 | Louise Elkins | 59 | Sister-in-law | — | England |
| 45 | Holland Elkins | 45 | Head | Auto Mechanic | Utah |
| 46 | William Haslam | 61 | Head | Farmer | Utah |
| 47 | Minnie B Haslam | 61 | Wife | — | Utah |
| 48 | Soren Nielsen | 59 | Head | Painter & Paper Hanger | Utah |
| 49 | Clory E Nielsen | 59 | Wife | — | Utah |
| 50 | Fred P Jensen | 52 | Head | Real Estate Broker | Utah |
| 51 | Lucy Anna Jensen | 32 | Wife | — | Arizona |
| 52 | Ray La Mar Jackson | 5 | Step-son | — | Utah |
| 53 | Arlene Lou Jackson | 4 | Step-daughter | — | Utah |
| 55 | Linea A Allen | 50 | Head | Waitress | Sweden |
| 56 | Myra Allen | 23 | Daughter | — | Utah |
| 57 | Henry A Gregory | 40 | Head | Truck Driver | Utah |
| 58 | Evelyn R Gregory | 35 | Wife | — | Utah |
| 59 | Eugene A Gregory | 18 | Son | Student | Utah |
| 60 | Lora Gregory | 16 | Daughter | Student | Utah |
| 61 | Leon R Gregory | 14 | Son | Student | Utah |
| 62 | Phyllis Gregory | 12 | Daughter | — | Utah |
| 63 | Afton Gregory | 10 | Daughter | — | Utah |
| 64 | Carol Gregory | 8 | Daughter | — | Utah |
| 65 | Norman Gregory | 5 | Daughter | — | Utah |
| 66 | David Gregory | 0 | Son | — | Utah |
| 67 | Robert Caldwell | 41 | Head | Pick & Shovel Laborer | Utah |
| 68 | Elizabeth Caldwell | 39 | Wife | — | Utah |
| 69 | Robert D Caldwell THIS PERSON | 18 | Son | Laborer | Idaho |
| 70 | Donna Beth Caldwell | 16 | Daughter | Student | Utah |
| 71 | William D Caldwell | 14 | Son | Student | Utah |
| 72 | Erman L Caldwell | 10 | Daughter | — | Utah |
| 73 | Richard L Caldwell | 8 | Son | — | Utah |
| 74 | Vivian L Caldwell | 4 | Daughter | — | Utah |
| 75 | Larry Caldwell | 1 | Son | — | Utah |
| 76 | Clarence J D Pollett | 53 | Head | Night Watchman | Arizona |
| 77 | Margaret Pollett | 54 | Wife | — | Utah |
| 78 | Ajay Pollett | 22 | Son | Truckman | Utah |
| 79 | Gilla Pollett | 14 | Daughter | Student | Utah |
| 80 | Milo Pollett | 12 | Son | — | Utah |
Related Census Records
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)