WD
William Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dallas-County, Texas
Our Model Tree links this William Duncan across the 1920, 1930 and 1940 US Censuses in Dallas-County, Texas (XGBoost, ~Confirmed), with identified parents Adelaide & William — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Texas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dallas-County, Texas |
| Surname | Duncan |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Dallas |
| 1935 Residence (County) | Dallas |
| Additional Details | |
| Occupation | Ice-cream Server |
| Industry | Dairy & Ice Cream Co. |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 810 |
| Highest Grade | H 4 |
| 1935 Residence | Texas |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Ice-Cream Server |
| Township / Ward | Dallas City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Duncan | Head | — | 47 | ~1893 |
| James Duncan | Son | — | 19 | ~1921 |
| David Duncan | Son | — | 17 | ~1923 |
| William Duncan | Son | — | 21 | ~1919 |
| Adelaide Duncan | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Dallas, Texas
Son, age 1
Dallas, Texas · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | none |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1930
Dallas, Texas
Son, age 11
Dallas, Texas · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Dallas-County, Texas
Son, age 21
Dallas-County, Texas · implied b. ~1919 — 5 household members
| Surname | Duncan |
| Given Name | William L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Dallas |
| 1935 Residence (County) | Dallas |
| Occupation | Ice-cream Server |
| Industry | Dairy & Ice Cream Co. |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 810 |
| Highest Grade | H 4 |
| 1935 Residence | Texas |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 William Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Adelaide Duncan (~0.92 confidence) and father William Duncan (~0.92 confidence) and father William Duncan (~0.92 confidence) and mother Adelaide Duncan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Adelaide Duncan
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
William Duncan
b. ~1891
Source father
● Household
· direct · ~0.92
Father
William Duncan
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Adelaide Duncan
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Duncan
Son · 1940 · age 21 · b. ~1919 · Texas
★ You are viewing this record
Sibling
James Duncan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Duncan
Sibling · 1940 · age 17
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 — Dallas-County, Texas
Open full size
1940 US Federal Census — Dallas-County, Texas
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04173-00782)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lorna Lee Greenway | 10 | Daughter | — | Texas |
| 2 | Neal A. Beck | 60 | Head | Railroad | Texas |
| 3 | Phillip H. Beck | 23 | Son | Clerk | Texas |
| 4 | Vivian Beck | 19 | Daughter | Saleslady | Oklahoma |
| 5 | Lyla May Peck | 51 | Mother-in-law | — | Texas |
| 6 | Samuel E. Rhodes | 56 | Head | Salesman | Texas |
| 7 | Ida C. Rhodes | 56 | Wife | — | Texas |
| 8 | Russell Rhodes | 16 | Son | — | Texas |
| 9 | Leonard F. Lasater | 44 | Head | Owner | Texas |
| 10 | Reggie R. Lasater | 43 | Wife | Clerk | Texas |
| 11 | Joseph R. Jackson | 65 | Lodger | Retired | Kentucky |
| 12 | Ruby Vaughn | 31 | Head | — | Texas |
| 13 | Billie Ruth Vaughn | 15 | Daughter | — | Texas |
| 14 | W. L. Jr. Vaughn | 13 | Son | — | Texas |
| 15 | Florence Yarbrough | 18 | Lodger | Car Hop | Texas |
| 16 | Benjamin Jarrett | 37 | Head | Salesman | Texas |
| 17 | Beulah Jarrett | 34 | Wife | — | Arkansas |
| 18 | Wayne K. Jarrett | 13 | Son | — | Texas |
| 19 | Shirley A. Jarrett | 6 | Daughter | — | Texas |
| 20 | Jack Badgett | 26 | Head | Truck Driver | Texas |
| 21 | Evelyn M. Badgett | 20 | Wife | — | Texas |
| 22 | Robert J. Badgett | 2 | Son | — | Texas |
| 23 | Wm. S. Hornbeck | 34 | Head | Electrician | Oklahoma |
| 24 | Ruth E. Hornbeck | 30 | Wife | School Teacher | Oklahoma |
| 25 | John F. Dickson | 47 | Head | Painter Contractor | Arkansas |
| 26 | Marie A. Dickson | 39 | Wife | — | Texas |
| 27 | Mary M. Dickson | 14 | Daughter | — | Texas |
| 28 | Jennett A. Dickson | 4 | Daughter | — | Texas |
| 29 | William S. Duncan | 47 | Head | Contractor | Texas |
| 30 | Adelaide F. Duncan | 55 | Wife | — | Texas |
| 31 | William L. Duncan THIS PERSON | 21 | Son | Ice-Cream Server | Texas |
| 32 | James F. Duncan | 19 | Son | Student Architect | Texas |
| 33 | David Donald Duncan | 17 | Son | — | Texas |
| 34 | Walter T. Bovell | 51 | Head | Adjuster | Texas |
| 35 | Louie V. Bovell | 49 | Wife | — | Virginia |
| 36 | Mary Elizabeth Bovell | 14 | Daughter | — | Texas |
| 37 | Vinko T. Milich | 45 | Head | Salesman & Mgr. | Yugoslavia |
| 38 | Lillian G. Milich | 58 | Wife | — | North Carolina |
| 39 | Charles Galloway | 59 | Head | Carpenter | Arkansas |
Pedigree Summary
William + 2 siblings
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)