CD
Charles Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Barnwell-County, South Carolina
Our Model Tree links this Charles Duncan across the 1930 and 1940 US Censuses in Barnwell-County, South Carolina (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 10-person household.
Age 17
b. ~1923
Male
Son
Born: South Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Barnwell-County, South Carolina |
| Surname | Duncan |
| Given Name | Charles R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Barnwell |
| 1935 Residence (County) | Barnwell |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Barnwell |
| Est. Birth Year | ~1923 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Benjamin Duncan | Son | — | 6 | ~1934 |
| Joseph Duncan | Son | — | 5 | ~1935 |
| Equilla Duncan | Daughter | — | 13 | ~1927 |
| Deborah Duncan | Daughter | — | 8 | ~1932 |
| Rivers Duncan | Head | — | 51 | ~1889 |
| David Duncan | Son | — | 11 | ~1929 |
| Mary Duncan | Spouse | — | 41 | ~1899 |
| Charles Duncan | Son | — | 17 | ~1923 |
| Ruby Duncan | Daughter | — | 19 | ~1921 |
| Mary Duncan | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Barnwell, South …
Son, age 7
Barnwell, South Carolina · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Charles R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 7 |
| Marital Status | Single |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Barnwell-County, South …
Son, age 17
Barnwell-County, South Carolina · implied b. ~1923 — 10 household members
| Surname | Duncan |
| Given Name | Charles R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | South Carolina |
| 1935 Residence (City) | Barnwell |
| 1935 Residence (County) | Barnwell |
| Class of Worker | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 Charles Duncan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Charles Duncan
Son · 1940 · age 17 · b. ~1923 · South Carolina
★ You are viewing this record
Sibling
Mary Duncan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Duncan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Deborah Duncan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Duncan
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Benjamin Duncan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Equilla Duncan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Duncan
Sibling · 1940 · age 19
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 — Barnwell-County, South Carolina
Open full size
1940 US Federal Census — Barnwell-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03789-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dela Britt | 59 | Head | Laundress | South Carolina |
| 42 | Hettie A Britt | 35 | Daughter | House Maid | South Carolina |
| 43 | James Britt | 20 | Son | Porter | South Carolina |
| 44 | Perry Cave | 62 | Head | Laborer | South Carolina |
| 45 | Blanche Cave | 54 | Wife | Wash Woman | South Carolina |
| 46 | Blanche M Patterson | 17 | Daughter | — | South Carolina |
| 47 | George Kennedy | 33 | Head | Attendant | South Carolina |
| 48 | Glenn Kennedy | 31 | Wife | Cook | South Carolina |
| 49 | Ben Thomas | 69 | Head | — | South Carolina |
| 50 | Rivers Duncan | 51 | Head | Meat Cutter | South Carolina |
| 51 | Mary A Duncan | 41 | Wife | Teacher | South Carolina |
| 52 | Ruby M Duncan | 19 | Daughter | — | South Carolina |
| 53 | Charles R Duncan THIS PERSON | 17 | Son | — | South Carolina |
| 54 | Mary Duncan | 16 | Daughter | — | South Carolina |
| 55 | Equilla Duncan | 13 | Daughter | — | South Carolina |
| 56 | David Duncan | 11 | Son | — | South Carolina |
| 57 | Deborah Duncan | 8 | Daughter | — | South Carolina |
| 58 | Joseph R Duncan | 5 | Son | — | South Carolina |
| 59 | Benjamin Duncan | 6 | Son | — | South Carolina |
| 60 | Jennings Jones | 79 | Head | — | South Carolina |
| 61 | Ella M Jones | 70 | Wife | Wash Woman | South Carolina |
| 62 | Ogretta Hart | 47 | Daughter | Teacher | South Carolina |
| 63 | Homer Walker | 29 | Head | Laborer | South Carolina |
| 64 | Nancy Walker | 31 | Wife | — | South Carolina |
| 65 | Louie Anderson | 27 | Head | Cook | South Carolina |
| 66 | Odom Anderson | 11 | Son | — | South Carolina |
| 67 | Mary White | 43 | Head | — | South Carolina |
| 68 | Mary Armstrong | 17 | Grand Daughter | Wash Woman | South Carolina |
| 69 | Helen Armstrong | 14 | Grand Daughter | Wash Woman | South Carolina |
| 70 | Stella Champell | 51 | Head | Farm Hand | South Carolina |
| 71 | Rosa Lee Champell | 18 | Daughter | Farm Hand | South Carolina |
| 72 | Earnest Champell | 16 | Son | Butler | South Carolina |
| 73 | Ernest Champell | 15 | Son | — | South Carolina |
| 74 | Charity Jamison | 44 | Head | Domestic Servant | South Carolina |
| 75 | Grant Harris | 18 | Son | Laborer | South Carolina |
| 76 | Joseph Jackson | 11 | Son | — | South Carolina |
| 77 | Warren Jamison | 67 | Father | Laborer | South Carolina |
| 78 | Eva Johnson | 40 | Head | — | South Carolina |
| 79 | Connie Austin | 34 | Head | Cook | South Carolina |
| 80 | Eddie L Austin | 8 | Son | — | South Carolina |
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)