CD
Charles Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Charles Duncan across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents Joseph & Ohelia — first a head (b.~1887), then head of a 4-person household.
Age 53
b. ~1887
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Duncan |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Hauvers District ELECTION DISTRICT 10 |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Occupation | Laborer |
| Industry | W.P.A. Road construction |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 240 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Hauvers District Election District 10 |
| Est. Birth Year | ~1887 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Robert Duncan | Son | — | 1 | ~1939 |
| Beulah Duncan | Spouse | — | 35 | ~1905 |
| Guy Duncan | Son | — | 8 | ~1932 |
| Charles Duncan | Head | — | 53 | ~1887 |
Census Appearances
1920
Frederick, Maryland
Son, age 33
Frederick, Maryland · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunkin |
| Given Name | Charles W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Son, age 43
Frederick, Maryland · implied b. ~1887 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunkin |
| Given Name | Charles W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Head, age 53
Frederick-County, Maryland · implied b. ~1887 — 4 household members
| Surname | Duncan |
| Given Name | Charles |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Hauvers District ELECTION DISTRICT 10 |
| 1935 Residence (County) | Frederick |
| Occupation | Laborer |
| Industry | W.P.A. Road construction |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 240 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Dunkin (~0.92 confidence) and mother Ohelia Dunkin (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Dunkin
b. ~1854
Source father
● Household
· direct · ~0.92
Mother
Ohelia Dunkin
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Duncan
Head · 1940 · age 53 · b. ~1887 · Maryland
★ 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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01549-00137)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clyde Buhrman | 47 | Head | Merchant | Maryland |
| 2 | Leacy Buhrman | 41 | Wife | — | Maryland |
| 3 | Mildred Buhrman | 24 | Daughter | — | Maryland |
| 4 | Olive Buhrman | 19 | Daughter | — | Maryland |
| 5 | Leslie Buhrman | 17 | Son | Helper | Maryland |
| 6 | Francis Buhrman | 14 | Son | — | Maryland |
| 7 | Clifford B. Toms | 36 | Head | Laborer | Maryland |
| 8 | Kendall, Clyde Toms | 16 | Nephew | Laborer | Maryland |
| 9 | Wilbur - Ab Toms | 29 | Brother | Laborer | Maryland |
| 10 | Charles A. Toms | 61 | Head | Laborer | Maryland |
| 11 | Charles Duncan THIS PERSON | 53 | Head | Laborer | Maryland |
| 12 | Beulah Duncan | 35 | Wife | — | Maryland |
| 13 | Guy Duncan | 8 | Son | — | Maryland |
| 14 | Robert Duncan | 1 | Son | — | Maryland |
| 15 | Lester A. Smith | 41 | Head | Carpenter | Maryland |
| 16 | Maude M. Smith | 33 | Wife | — | Maryland |
| 17 | Betty Jane Smith | 13 | Daughter | — | Maryland |
| 18 | Albert L. Smith | 11 | Son | — | Maryland |
| 19 | Joseph Duncan | 86 | Head | — | Maryland |
| 20 | Otiefia Duncan | 76 | Wife | — | Maryland |
| 21 | Roscoe Duncan | 35 | Son | Laborer | Maryland |
| 22 | Alvie Brandenburg | 76 | Head | Farmer | Maryland |
| 23 | Estella Brandenburg | 73 | Wife | — | Maryland |
| 24 | Ray Brandenburg | 38 | Head | Farmer | Maryland |
| 25 | Rae Brandenburg | 38 | Wife | — | Maryland |
| 26 | Betty D. Brandenburg | 17 | Daughter | Waitress | Maryland |
| 27 | Ray Brandenburg | 16 | Son | — | Maryland |
| 28 | Jean Brandenburg | 14 | Son | — | Maryland |
| 29 | Harold Brandenburg | 12 | Son | — | Maryland |
| 30 | Carolyn Brandenburg | 10 | Daughter | — | Maryland |
| 31 | Nancy Jean Brandenburg | 3 | Daughter | — | Maryland |
| 32 | Julia Lee Brandenburg | 1 | Daughter | — | Maryland |
| 33 | Herman Cl. Hauver | 58 | Head | Mail Carrier | Maryland |
| 34 | Clara C. Hauver | 60 | Wife | — | Maryland |
| 35 | Pauline Hauver | 26 | Daughter | — | Maryland |
| 36 | Charles Hurley | 53 | Head | Farmer | Maryland |
| 37 | Rosa C. Hurley | 51 | Wife | — | Maryland |
| 38 | Leaster Hurley | 24 | Son | Labour | Maryland |
| 39 | Ethel Hurley | 18 | Daughter | — | Maryland |
| 40 | Elsie Hurley | 13 | Daughter | — | Maryland |
Pedigree Summary
Charles
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)