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Douglas Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yellowstone-County, Montana
Our Model Tree links this Douglas Smith across the 1930 and 1940 US Censuses in Yellowstone-County, Montana (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Yellowstone-County, Montana |
| Surname | Smith |
| Given Name | Douglas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | School Dist #2 Billings |
| 1935 Residence (County) | Yellowstone |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | School Dist 2 Billings |
| Est. Birth Year | ~1926 |
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 Douglas | Age | Birth yr |
|---|---|---|---|---|
| Montana Smith | Daughter | — | 20 | ~1920 |
| Fred Smith | Son | — | 10 | ~1930 |
| Douglas Smith | Son | — | 14 | ~1926 |
| Clement Smith | Son | — | 22 | ~1918 |
| Charles Smith | Head | — | 62 | ~1878 |
| Carrie Smith | Spouse | — | 52 | ~1888 |
Census Appearances
1930
Yellowstone, Montana
Son, age 4
Yellowstone, Montana · implied b. ~1926 — 34 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Douglas D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Canada-Eng |
| Mother's Birthplace | Sweden |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Yellowstone-County, Montana
Son, age 14
Yellowstone-County, Montana · implied b. ~1926 — 6 household members
| Surname | Smith |
| Given Name | Douglas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | School Dist #2 Billings |
| 1935 Residence (County) | Yellowstone |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Douglas Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Douglas Smith
Son · 1940 · age 14 · b. ~1926 · Montana
★ You are viewing this record
Sibling
Fred Smith
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clement Smith
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Montana Smith
Sibling · 1940 · age 20
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 — Yellowstone-County, Montana
Open full size
1940 US Federal Census — Yellowstone-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02234-00808)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hazel Cornelius | 45 | Wife | — | Missouri |
| 2 | Verne Cornelius | 21 | Son | — | Montana |
| 3 | Richard Cornelius | 20 | Son | — | Montana |
| 4 | Philip Cornelius | 18 | Son | — | Montana |
| 5 | Robert Cornelius | 14 | Son | — | Montana |
| 6 | David Cornelius | 13 | Son | — | Montana |
| 7 | Fred Grasskap | 37 | Head | Farmer | Russia |
| 8 | Pauline Grasskap | 32 | Wife | — | At Sea |
| 9 | Harold Grasskap | 12 | Son | — | Montana |
| 10 | Clarebelle Grasskap | 11 | Daughter | — | Montana |
| 11 | J. H. Bonwell | 71 | Head | Farmer | Missouri |
| 12 | Luella Bonwell | 68 | Wife | — | Iowa |
| 13 | Lit Harness | 61 | Brother in law | Help | Iowa |
| 14 | Charles Smith | 62 | Head | Linotype Operator | England |
| 15 | Carrie Smith | 52 | Wife | — | Sweden |
| 16 | Clement Smith | 22 | Son | Bee-Keeper | Montana |
| 17 | Montana Smith | 20 | Daughter | — | Montana |
| 18 | Douglas Smith THIS PERSON | 14 | Son | — | Montana |
| 19 | Fred Smith | 10 | Son | — | Montana |
| 20 | Herman J. Rookhuizen | 40 | Head | Contractor | Holland |
| 21 | Pearl Rookhuizen | 37 | Wife | — | Montana |
| 22 | Edward Rookhuizen | 20 | Son | — | Montana |
| 23 | Spiro Radunovitch | 49 | Head | Farmer | Yugo Slavia |
| 24 | Jeba Radunovitch | 38 | Wife | — | Yugo Slavia |
| 25 | Helen Radunovitch | 15 | Daughter | — | Montana |
| 26 | Olga Radunovitch | 14 | Daughter | — | Montana |
| 27 | Rosie Radunovitch | 13 | Daughter | — | Montana |
| 28 | Stella Radunovitch | 11 | Daughter | — | Montana |
| 29 | Natalie Radunovitch | 7 | Daughter | — | Montana |
| 30 | Max Lorenzen | 41 | Head | Farmer | Germany |
| 31 | Anna Lorenzen | 29 | Wife | — | Nebraska |
| 32 | Philip Liddle | 73 | Head | Farmer | Missouri |
| 33 | Josephine Liddle | 68 | Wife | — | Penn. |
| 34 | Festus Nace | 53 | Head | Carman | Tennessee |
| 35 | Nannie Nace | 43 | Wife | — | Tennessee |
| 36 | Cecil Nace | 21 | Son | — | Montana |
| 37 | Donald Nace | 19 | Son | — | Montana |
| 38 | Lawrence Nace | 17 | Son | — | Montana |
| 39 | Herman Rookhuizen | 69 | Head | Farmer | Holland |
| 40 | Jane Rookhuizen | 66 | Wife | — | Holland |
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)