RD
Robert Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clark-County, Arkansas
Our Model Tree links this Robert Duncan across the 1930 and 1940 US Censuses in Clark-County, Arkansas (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 11-person household.
Age 19
b. ~1921
Male
Son
Born: Arkansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Arkansas |
| Surname | Duncan |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Arkansas |
| 1935 Residence (City) | Missouri |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same House |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
| Township / Ward | Missouri |
| Est. Birth Year | ~1921 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Duncan | Daughter | — | 16 | ~1924 |
| James Duncan | Son | — | 1 | ~1939 |
| Charlie Duncan | Head | — | 51 | ~1889 |
| Charles Duncan | Son | — | 15 | ~1925 |
| Mary Duncan | Daughter | — | 9 | ~1931 |
| Audrey Duncan | Daughter | — | 12 | ~1928 |
| Robert Duncan | Son | — | 19 | ~1921 |
| Mary Duncan | Spouse | — | 42 | ~1898 |
| Herbert Duncan | Son | — | 4 | ~1936 |
| Marcus Duncan | Son | — | 21 | ~1919 |
| Johnnie Duncan | Son | — | 10 | ~1930 |
Census Appearances
1930
Clark, Arkansas
Son, age 9
Clark, Arkansas · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Arkansas |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Arkansas |
| Can Read/Write | Yes |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1940
Clark-County, Arkansas
Son, age 19
Clark-County, Arkansas · implied b. ~1921 — 11 household members
| Surname | Duncan |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Arkansas |
| 1935 Residence (City) | Missouri |
| 1935 Residence (County) | Clark |
| Hours Worked | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same House |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
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 Robert Duncan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Duncan
Son · 1940 · age 19 · b. ~1921 · Arkansas
★ You are viewing this record
Sibling
Charles Duncan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Duncan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Duncan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Duncan
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marcus Duncan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Duncan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Johnnie Duncan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Duncan
Sibling · 1940 · age 9
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 — Clark-County, Arkansas
Open full size
1940 US Federal Census — Clark-County, Arkansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00123-00596)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bonna Marks | 13 | Granddaughter | — | Arkansas |
| 42 | Ollie N. Hawthorne | 44 | Head | Operator | Louisiana |
| 43 | Daisie Hawthorne | 39 | Wife | — | Louisiana |
| 44 | James Hawthorne | 16 | Son | — | Louisiana |
| 45 | Lucille Hawthorne | 13 | Daughter | — | Arkansas |
| 46 | Annie L. Hawthorne | 12 | Daughter | — | Arkansas |
| 47 | Juanita Hawthorne | 9 | Daughter | — | Arkansas |
| 48 | Bonita Hawthorne | 7 | Daughter | — | Arkansas |
| 49 | George West Hawthorne | 6 | Son | — | Arkansas |
| 50 | Leon Hawthorne | 4 | Son | — | Arkansas |
| 51 | Naomi Hawthorne | 1 | Daughter | — | Arkansas |
| 52 | Georgia Corbin | 62 | Mother-in-law | — | Louisiana |
| 53 | Annie P. Corbin | 29 | Sister-in-law | Laundress | Louisiana |
| 54 | Henry Smith | 27 | Head | Laborer | Arkansas |
| 55 | Altha Q. Smith | 23 | Wife | — | Arkansas |
| 56 | Julius Corbin | 28 | Boarder | Laborer | Louisiana |
| 57 | Robert S. Deep | 24 | Head | Clerk | Arkansas |
| 58 | Dorothy Q. Deep | 20 | Wife | — | Arkansas |
| 59 | John T. Schue | 41 | Head | Painter | Illinois |
| 60 | Catherine Schue | 43 | Wife | — | Alabama |
| 61 | James W. Schue | 18 | Son | Operator | Arkansas |
| 62 | John Jr. Schue | 17 | Son | — | Arkansas |
| 63 | Dylie F. Schue | 14 | Daughter | — | Arkansas |
| 64 | Lillian E. Schue | 11 | Daughter | — | Arkansas |
| 65 | Charlie R. Duncan | 51 | Head | Plumber | Iowa |
| 66 | Mary E. Duncan | 42 | Wife | — | Arkansas |
| 67 | Marcus U. Duncan | 21 | Son | Truck Driver | Arkansas |
| 68 | Robert L. Duncan THIS PERSON | 19 | Son | — | Arkansas |
| 69 | Dorothy M. Duncan | 16 | Daughter | — | Arkansas |
| 70 | Charles R. Duncan | 15 | Son | — | Arkansas |
| 71 | Audrey L. Duncan | 12 | Daughter | — | Arkansas |
| 72 | Johnnie E. Duncan | 10 | Son | — | Arkansas |
| 73 | Mary Ruth Duncan | 9 | Daughter | — | Arkansas |
| 74 | Herbert L. Duncan | 4 | Son | — | Arkansas |
| 75 | James L. Duncan | 1 | Son | — | Arkansas |
| 76 | William M. Delue | 43 | Head | Painter | Illinois |
| 77 | Ossie M. Delue | 38 | Wife | — | Arkansas |
| 78 | James A. Delue | 86 | Father | — | Illinois |
| 79 | Golden L. Williams | 29 | Head | Truck Driver | Arkansas |
| 80 | Ella M. Williams | 24 | Wife | — | Arkansas |
Related Census Records
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)