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John Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Walla-Walla-County, Washington
Our Model Tree links this John Duncan across the 1920, 1930 and 1940 US Censuses in Walla-Walla-County, Washington (XGBoost, ~Confirmed), with identified parents A & Vera — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Walla-Walla-County, Washington |
| Surname | Duncan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Gore EP |
| 1935 Residence (County) | Walla Walla |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Laborer |
| Township / Ward | Gore Ep |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Jean Duncan | Daughter | — | 13 | ~1927 |
| A Duncan | Head | — | 44 | ~1896 |
| George Duncan | Son | — | 19 | ~1921 |
| John Duncan | Son | — | 21 | ~1919 |
| Walter Duncan | Son | — | 14 | ~1926 |
| Vera Duncan | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Walla Walla, …
Son, age 1
Walla Walla, Washington · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | John D |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Washington |
| Mother's Birthplace | California |
| Occupation | none |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Walla Walla, …
Son, age 11
Walla Walla, Washington · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | John G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Washington |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Walla-Walla-County, Washington
Son, age 21
Walla-Walla-County, Washington · implied b. ~1919 — 6 household members
| Surname | Duncan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Gore EP |
| 1935 Residence (County) | Walla Walla |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 450 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 John Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father A Duncan (~0.92 confidence) and mother Vera Duncan (~0.92 confidence) and mother Neva Duncan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
A Duncan
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Vera Duncan
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Neva Duncan
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Duncan
Son · 1940 · age 21 · b. ~1919 · Washington
★ You are viewing this record
Sibling
George Duncan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Duncan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Duncan
Sibling · 1940 · age 14
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 — Walla-Walla-County, Washington
Open full size
1940 US Federal Census — Walla-Walla-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04367-00789)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clarence Martin | 47 | Head | Laborer | Washington |
| 2 | Agnes Martin | 34 | Wife | — | Missouri |
| 3 | Dailene Martin | 17 | Daughter | — | Washington |
| 4 | Velma Mcbride | 16 | Daughter | — | Oklahoma |
| 5 | A. G. Duncan | 44 | Head | Farmer | Washington |
| 6 | Vera Duncan | 44 | Wife | — | California |
| 7 | John Duncan THIS PERSON | 21 | Son | Laborer | Washington |
| 8 | George Duncan | 19 | Son | — | Washington |
| 9 | Walter Duncan | 14 | Son | — | Washington |
| 10 | Jean Duncan | 13 | Daughter | — | Washington |
| 11 | Clara Conkey | 73 | Head | — | Oregon |
| 12 | Glen B. Conkey | 43 | Son-in-law | Reporter | Oregon |
| 13 | Verna Conkey | 39 | Wife | Receptionist | Washington |
| 14 | Carlton Conkey | 16 | Son | — | Washington |
| 15 | William Pyke | 68 | Head | Farmer | Wisconsin |
| 16 | Anna Pyke | 78 | Wife | — | Missouri |
| 17 | Thomas Marshall | 64 | Head | — | Maryland |
| 18 | Grace Marshall | 44 | Wife | — | Nebraska |
| 19 | Margaret Marshall | 19 | Daughter | — | Washington |
| 20 | Oscar Tarpley | 55 | Head | Laborer | Arkansas |
| 21 | Ruth Tarpley | 42 | Wife | — | Washington |
| 22 | Wesley Tarpley | 14 | Son | Laborer | Washington |
| 23 | Alma Richardson | 44 | Head | — | Iowa |
| 24 | George Richardson | 24 | Son | Laborer | Washington |
| 25 | Joyce Richardson | 21 | Daughter | — | Washington |
| 26 | Theodore Concelled | 19 | Son | — | Oregon |
| 27 | Waneta Richardson | 17 | Daughter | — | Oregon |
| 28 | Olga Richardson | 15 | Daughter | — | Oregon |
| 29 | Margaret Richardson | 12 | Daughter | — | Washington |
| 30 | Sarah Richardson | 10 | Daughter | — | Washington |
| 31 | Thomas Richardson | 5 | Son | — | Washington |
| 32 | Art Sweeney | 48 | Head | Laborer | Iowa |
| 33 | Mary Sweeney | 59 | Wife | — | Michigan |
| 34 | Charles Tarpley | 49 | Head | Laborer | Washington |
| 35 | B. W. Wright | 71 | Head | — | Missouri |
| 36 | George Carlton | 33 | Head | Laborer | Oregon |
| 37 | Alice Carlton | 28 | Wife | — | Nebraska |
| 38 | Melvin Carlton | 6 | Son | — | Oregon |
| 39 | Malla Carlton | 5 | Daughter | — | Washington |
| 40 | Laverne Carlton | 2 | Son | — | Washington |
Pedigree Summary
John + 3 siblings
Gen 1 · 3 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)