DT
David Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this David Thomas across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Frank & David — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Thomas |
| Given Name | David B (AB) |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Denver |
| Est. Birth Year | ~1917 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Grace Thomas | Head | — | 55 | ~1885 |
| Col Thomas | Other | — | 52 | ~1888 |
| Ellen Thomas | Other | — | 40 | ~1900 |
| Lela Strugnell | Other | — | 57 | ~1883 |
| Emma Deneault | Other | — | 26 | ~1914 |
| David Thomas | Son | — | 23 | ~1917 |
Census Appearances
1920
Denver, Colorado
Son, age 2
Denver, Colorado · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David B. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Denver, Colorado
Son, age 12
Denver, Colorado · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Son, age 23
Denver-County, Colorado · implied b. ~1917 — 6 household members
| Surname | Thomas |
| Given Name | David B (AB) |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver |
| 1935 Residence (County) | Denver |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Frank Thomas (~0.92 confidence) and father David Thomas (~0.92 confidence) and mother Grace Thomas (~0.92 confidence) and mother Grace Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Thomas
b. ~1884
Source father
● Household
· direct · ~0.92
Father
David Thomas
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Grace Thomas
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Grace Thomas
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Thomas
Son · 1940 · age 23 · b. ~1917 · Colorado
★ 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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00488-00177)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Grace Thomas | 55 | Head | — | Colorado |
| 42 | David B (Ab) Thomas THIS PERSON | 23 | Son | — | Colorado |
| 43 | Col. L Thomas | 52 | Brother in Law | Assistant Manager | Colorado |
| 44 | Ellen Thomas | 40 | Sister in Law | — | Kansas |
| 45 | Lela Strugnell | 57 | Sister | Filing | Colorado |
| 46 | Emma Deneault | 26 | Lodger | — | Kansas |
| 47 | Lucy Posters | 79 | Head | — | Indiana |
| 48 | Frances Nixon | 60 | Head | — | Nebraska |
| 49 | Don C Nixon | 35 | Son | — | Colorado |
| 50 | Clarence V Anderson | 42 | Head | Carpenter | Montana |
| 51 | Valerie Anderson | 36 | Wife | — | Wisconsin |
| 52 | Marlys J Anderson | 8 | Daughter | — | Colorado |
| 53 | Henry Fraker | 67 | Father in Law | — | Missouri |
| 54 | Marie P Potter | 78 | Lodger | — | Illinois |
| 55 | Alvin Lapping | 35 | Head | Meat Cutter | Nebraska |
| 56 | Ann Lapping | 22 | Wife | — | Kansas |
| 57 | Louise D Howes | 84 | Head | — | Pennsylvania |
| 58 | Anna M Brauff | 55 | Niece | Companion | Pennsylvania |
| 59 | W. F. Mathison | 71 | Head | Salesman | Nebraska |
| 60 | Helen Mathison | 47 | Wife | Bookkeeper & Stenographer | Ohio |
| 61 | George H Howes | 59 | Head | Inspector | Iowa |
| 62 | Edith E Howes | 49 | Wife | — | Iowa |
| 63 | Marie Howes | 22 | Daughter | Teacher | Wyoming |
| 64 | George H Jr Howes | 20 | Son | — | Wyoming |
| 65 | Clarence Leisenring | 45 | Head | Manager | Colorado |
| 66 | Ida Leisenring | 45 | Wife | — | Colorado |
| 67 | Burton Leisenring | 21 | Son | Storage Man | Colorado |
| 68 | J. E. Wilkerson | 59 | Head | Conductor | Missouri |
| 69 | Mary (Ab) Wilkerson | 43 | Wife | — | Missouri |
| 70 | Laura Etherton | 72 | Head | — | Missouri |
| 71 | Joseph Hand | 13 | Grandson | — | Colorado |
| 72 | Glorine Hand | 11 | Granddaughter | — | Colorado |
| 73 | Orville Shearer | 46 | Head | Salesman | Kansas |
| 74 | Ethel A Shearer | 47 | Wife | — | Kansas |
| 75 | John A Shearer | 55 | Brother | — | Pennsylvania |
| 76 | Ella F Shearer | 76 | Mother | — | Indiana |
| 77 | Dorothy H Maddell | 25 | Daughter | Stenographer | Kansas |
| 78 | Joyce Anne Maddell | 4 | Granddaughter | — | Idaho |
| 79 | Elizabeth Schwengler | 54 | Head | — | Nebraska |
| 80 | R. Kenneth Schwengler | 29 | Son | Ranch Foreman | Nebraska |
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)