DT
David Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Duchesne-County, Utah
Our Model Tree links this David Thomas across the 1920, 1930 and 1940 US Censuses in Duchesne-County, Utah (XGBoost, ~Confirmed), with identified parents Tom & Benjamin — first a head (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Head
Born: Utah
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Duchesne-County, Utah |
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Duchesne Precinct (part) |
| 1935 Residence (County) | Duchesne |
| Additional Details | |
| Occupation | Trapper |
| Industry | Government |
| Class of Worker | GW |
| Hours Worked | 52 |
| Income (1939) | 1278 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Trapper |
| Township / Ward | Duchesne Precinct Part |
| Est. Birth Year | ~1908 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Alyce Thomas | Daughter | — | 4 | ~1936 |
| David Thomas | Head | — | 32 | ~1908 |
| Darwin Thomas | Son | — | 6 | ~1934 |
| Elwin Thomas | Son | — | 11 | ~1929 |
| Ruby Thomas | Spouse | — | 23 | ~1917 |
Census Appearances
1920
Duchesne, Utah
Son, age 11
Duchesne, Utah · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Duchesne, Utah
Son, age 22
Duchesne, Utah · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Utah |
| Age at First Marriage | 19 |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | Farmer |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Duchesne-County, Utah
Head, age 32
Duchesne-County, Utah · implied b. ~1908 — 5 household members
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Duchesne Precinct (part) |
| 1935 Residence (County) | Duchesne |
| Occupation | Trapper |
| Industry | Government |
| Class of Worker | GW |
| Hours Worked | 52 |
| Income (1939) | 1278 |
| Highest Grade | H-1 |
| 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 David Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Tom Thomas (~0.92 confidence) and father Benjamin Thomas (~0.92 confidence) and mother Elizabeth Thomas (~0.92 confidence) and mother Elizabeth Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Tom Thomas
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Benjamin Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Thomas
Head · 1940 · age 32 · b. ~1908 · Utah
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Duchesne-County, Utah
Open full size
1940 US Federal Census — Duchesne-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04212-00675)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Chriss Merkley | 44 | Head | Laborer | Utah |
| 42 | Nina Merkley | 35 | Wife | — | Wyoming |
| 43 | Al White | 38 | Head | Manager | Utah |
| 44 | Nelson R. Merkley | 34 | Head | Manager | Utah |
| 45 | Reeva B. Merkley | 32 | Wife | — | Utah |
| 46 | Laurel Merkley | 7 | Daughter | — | Utah |
| 47 | Wilson J. Merkley | 38 | Head | Manager | Utah |
| 48 | Fay E. Merkley | 38 | Wife | — | Utah |
| 49 | Kirk Merkley | 15 | Son | — | Utah |
| 50 | Philip Merkley | 14 | Son | — | Utah |
| 51 | Norma Merkley | 12 | Daughter | — | Utah |
| 52 | Donna Merkley | 9 | Daughter | — | Utah |
| 53 | Hal Merkley | 7 | Son | — | Utah |
| 54 | Kipp Merkley | 5 | Son | — | Utah |
| 55 | Aldura Merkley | 69 | Head | — | Utah |
| 56 | Hugh Merkley | 29 | Son | Manager | Utah |
| 57 | Jerry Merkley | 42 | Head | Manager | Utah |
| 58 | Vinda Merkley | 42 | Wife | — | Utah |
| 59 | Errol Merkley | 14 | Daughter | — | Utah |
| 60 | Roland Merkley | 12 | Son | — | Utah |
| 61 | Mary Merkley | 10 | Daughter | — | Utah |
| 62 | Joseph B. Cowan | 66 | Head | Manager | Utah |
| 63 | Vella Cowan | 58 | Wife | — | Utah |
| 64 | Shirley W. Cowan | 32 | Son | Laborer | Utah |
| 65 | Clifton O. Cowan | 24 | Son | Laborer | Utah |
| 66 | Robert T. Cowan | 22 | Son | — | Utah |
| 67 | John Abbott | 49 | Head | Manager | Utah |
| 68 | Sylvia Abbott | 37 | Wife | — | Utah |
| 69 | Elva Abbott | 15 | Daughter | — | Utah |
| 70 | Arnold Abbott | 12 | Son | — | Utah |
| 71 | Ward Abbott | 11 | Son | — | Utah |
| 72 | Jon Abbott | 9 | Son | — | Utah |
| 73 | Lloyd Abbott | 7 | Son | — | Utah |
| 74 | Norman Abbott | 4 | Son | — | Utah |
| 75 | Jay Abbott | 3 | Son | — | Utah |
| 76 | David Thomas THIS PERSON | 32 | Head | Trapper | Utah |
| 77 | Ruby Thomas | 23 | Wife | — | Utah |
| 78 | Elwin Thomas | 11 | Son | — | Utah |
| 79 | Darwin Thomas | 6 | Son | — | Utah |
| 80 | Alyce Thomas | 4 | Daughter | — | Utah |
Pedigree Summary
David
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)