WD
William Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Nelson-County, Kentucky
Our Model Tree links this William Duncan across the 1920, 1930 and 1940 US Censuses in Nelson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Robert & Ocie — first a head (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Nelson-County, Kentucky |
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Magisterial Dist 3 |
| 1935 Residence (County) | Nelson |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 360 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Farmer |
| Township / Ward | Magisterial Dist 3 |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Duncan | Head | — | 25 | ~1915 |
| William Duncan | Son | — | ~1940 | |
| James Duncan | Son | — | 2 | ~1938 |
| Virginia Duncan | Spouse | — | 18 | ~1922 |
Census Appearances
1920
Nelson, Kentucky
Son, age 3
Nelson, Kentucky · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Nelson, Kentucky
Son, age 14
Nelson, Kentucky · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Nelson-County, Kentucky
Head, age 25
Nelson-County, Kentucky · implied b. ~1915 — 4 household members
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Magisterial Dist 3 |
| 1935 Residence (County) | Nelson |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 360 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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: father Robert Duncan (~0.92 confidence) and mother Ocie Duncan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Duncan
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Ocie Duncan
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Duncan
Head · 1940 · age 25 · b. ~1915 · Kentucky
★ 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 — Nelson-County, Kentucky
Open full size
1940 US Federal Census — Nelson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01345-00279)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Hillard | 26 | Head | Laborer | Kentucky |
| 2 | Irene Hillard | 24 | Wife | — | Kentucky |
| 3 | Richard Jr. Hillard | 4 | Son | — | Kentucky |
| 4 | Leo Hillard | 2 | Son | — | Kentucky |
| 5 | John W. Culver | 51 | Head | Farmer | Missouri |
| 6 | Mildred Culver | 47 | Wife | — | Kentucky |
| 7 | John W. Culver | 29 | Son | Laborer | Kentucky |
| 8 | Homer Culver | 24 | Son | Laborer | Kentucky |
| 9 | Victor Culver | 21 | Son | Farmer | Kentucky |
| 10 | Clois Noel | 49 | Head | Farmer | Kentucky |
| 11 | Hattie Noel | 43 | Wife | — | Kentucky |
| 12 | Asa L. Noel | 20 | Son | Farmer | Kentucky |
| 13 | Levie Noel | 18 | Son | Farmer | Kentucky |
| 14 | Virginia Noel | 12 | Daughter | — | Kentucky |
| 15 | Alice Noel | 11 | Daughter | — | Kentucky |
| 16 | Mattie Bean | 53 | Head | — | Kentucky |
| 17 | Cedrick H. Bean | 30 | Son | Farmer | Kentucky |
| 18 | Ira F. Bean | 24 | Son | Farmer | Kentucky |
| 19 | Francis Bean | 25 | Son's wife | — | Kentucky |
| 20 | Mary E. Bean | 6 | Granddaughter | — | Kentucky |
| 21 | Lois M. Bean | 2 | Granddaughter | — | Kentucky |
| 22 | Jetta Sarnell | 18 | Daughter | — | Kentucky |
| 23 | Benjamin Newman | 41 | Head | Farmer | Kentucky |
| 24 | Elsie Newman | 42 | Wife | — | Kentucky |
| 25 | Ruth Newman | 19 | Daughter | — | Kentucky |
| 26 | Benjamin Newman | 15 | Son | — | Kentucky |
| 27 | Edith Newman | 11 | Daughter | — | Kentucky |
| 28 | William Duncan THIS PERSON | 25 | Head | Farmer | Kentucky |
| 29 | Virginia Duncan | 18 | Wife | — | Kentucky |
| 30 | James Lee Duncan | 2 | Son | — | Kentucky |
| 31 | William Jr. Duncan | 0 | Son | — | Kentucky |
| 32 | Coy L. Stone | 35 | Head | Farmer | Kentucky |
| 33 | Mattie Stone | 36 | Wife | — | Kentucky |
| 34 | Mary J. Stone | 14 | Daughter | — | Kentucky |
| 35 | Madeline Stone | 2 | Daughter | — | Kentucky |
| 36 | W. Lee Sproutman | 69 | Head | — | Kentucky |
| 37 | Hardin Walters | 43 | Head | Farmer | Kentucky |
| 38 | Ruby Walters | 32 | Wife | — | Kentucky |
| 39 | Lorene Walters | 13 | Daughter | — | Kentucky |
| 40 | Wilbur Walters | 10 | Son | — | Kentucky |
Related Census Records
Pedigree Summary
William
Gen 1 · 2 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)