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William Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Clark-County, Indiana
Our Model Tree links this William Duncan across the 1920, 1930 and 1940 US Censuses in Clark-County, Indiana (XGBoost, ~Confirmed), with identified parents Albert & Laura — first a son (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Son
Born: Kentucky
Separated
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Indiana |
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 34 |
| Marital Status | Separated |
| Birthplace | Kentucky |
| 1935 Residence (City) | Claysburg |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Occupation | House Man |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | House Man |
| Township / Ward | Claysburg |
| Est. Birth Year | ~1906 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Duncan | Head | — | 66 | ~1874 |
| William Duncan | Son | — | 34 | ~1906 |
| Laura Duncan | Spouse | — | 69 | ~1871 |
Census Appearances
1920
Vanderburg, Indiana
Son, age 14
Vanderburg, Indiana · implied b. ~1906 — 9 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Clark, Indiana
Son, age 24
Clark, Indiana · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William, P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Porter |
| Industry | Hotel |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Clark-County, Indiana
Son, age 34
Clark-County, Indiana · implied b. ~1906 — 3 household members
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 34 |
| Marital Status | Separated |
| Birthplace | Kentucky |
| 1935 Residence (City) | Claysburg |
| 1935 Residence (County) | Clark |
| Occupation | House Man |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 40 |
| 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 3 locations, using XGBoost record linkage. Identified parents: father Albert Duncan (~0.92 confidence) and mother Laura Duncan (~0.92 confidence) and father William Duncan (~0.92 confidence) and mother Laura Duncan (~0.92 confidence) and mother Lura Duncan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Duncan
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Laura Duncan
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
William Duncan
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Laura Duncan
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Lura Duncan
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Duncan
Son · 1940 · age 34 · b. ~1906 · Indiana
★ 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 — Clark-County, Indiana
Open full size
1940 US Federal Census — Clark-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01031-00190)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Halson | 62 | Head | Laborer | Tennessee |
| 42 | Mamie Halson | 56 | Wife | — | Kentucky |
| 43 | John Henry Ferguson | 29 | Head | Laborer | Indiana |
| 44 | Mollie Johnson | 44 | Mother | Maid | Kentucky |
| 45 | Jimie Ferguson | 33 | Aunt | New Worker | Kentucky |
| 46 | William V. Duncan | 66 | Head | Porter | Kentucky |
| 47 | Laura Duncan | 69 | Wife | — | Kentucky |
| 48 | William Duncan THIS PERSON | 34 | Son | House Man | Kentucky |
| 49 | Frank Vaughn | 64 | Head | Laborer | Indiana |
| 50 | Martha Vaughn | 45 | Wife | — | Indiana |
| 51 | Pauline Vaughn | 29 | Daughter | — | Indiana |
| 52 | Frank Vaughn | 25 | Son | Laborer | Indiana |
| 53 | John Collins | 55 | Head | Laborer | Indiana |
| 54 | Clara Collins | 54 | Wife | — | Kentucky |
| 55 | Walter H. Mclean | 53 | Head | Laborer | Tennessee |
| 56 | Ada Mclean | 41 | Wife | — | Indiana |
| 57 | Walter J. Mclean | 23 | Son | Porter | Indiana |
| 58 | Bertie M. Hackley | 34 | Head | Maid | Indiana |
| 59 | Eudell Hackley | 12 | Son | — | Indiana |
| 60 | Loraine Hackley | 12 | Daughter | — | Indiana |
| 61 | Alma Yarbough | 34 | Head | Maid | Kentucky |
| 62 | Frye, Thelma Yarbough | 15 | Daughter | — | Indiana |
| 63 | James Hancock | 35 | Head | Laborer | Indiana |
| 64 | Orphra Hancock | 32 | Wife | — | Kentucky |
| 65 | Louise Hancock | 11 | Daughter | — | Indiana |
| 66 | Cleona Hancock | 9 | Daughter | — | Indiana |
| 67 | James Hancock | 7 | Son | — | Indiana |
| 68 | Betty Jean Hancock | 1 | Daughter | — | Indiana |
| 69 | Lechetta Davis | 62 | Head | — | Kentucky |
| 70 | John Anderson | 66 | Head | House Man | Kentucky |
| 71 | Barney Anderson | 91 | Head | — | Kentucky |
| 72 | Ray Miles | 55 | Head | Machinist Helper | Kentucky |
| 73 | Lottie Miles | 58 | Wife | — | Kentucky |
| 74 | Evelyn Miles | 25 | Daughter | Maid | Indiana |
| 75 | Arthur Miles | 10 | Son | — | Indiana |
| 76 | Summer, Earl Miles | 19 | Son | — | Indiana |
| 77 | Bessie Hickman | 30 | Head | — | Tennessee |
| 78 | Annie L. Hickman | 11 | Daughter | — | Indiana |
| 79 | Dillard R. Hickman | 10 | Son | — | Indiana |
| 80 | Francis M. Johnson | 63 | Head | Janitor | Louisiana |
Pedigree Summary
William
Gen 1 · 5 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)