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John Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mayes-County, Oklahoma
Our Model Tree links this John Duncan across the 1920, 1930 and 1940 US Censuses in Mayes-County, Oklahoma (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 3-person household.
Age 67
b. ~1873
Male
Head
Born: Arkansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mayes-County, Oklahoma |
| Surname | Duncan |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Bryan #1 |
| 1935 Residence (County) | Mayes |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
| Occupation | Farmer |
| Township / Ward | Bryan 1 |
| Est. Birth Year | ~1873 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Duncan | Head | — | 67 | ~1873 |
| John Duncan | Son | — | 12 | ~1928 |
| Mary Duncan | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Mayes, Oklahoma
Head, age 46
Mayes, Oklahoma · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Arkansas |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1930
Mayes, Oklahoma
Head, age 57
Mayes, Oklahoma · implied b. ~1873 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | J. C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Arkansas |
| Age at First Marriage | 34 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Arkansas |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1940
Mayes-County, Oklahoma
Head, age 67
Mayes-County, Oklahoma · implied b. ~1873 — 3 household members
| Surname | Duncan |
| Given Name | John C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Bryan #1 |
| 1935 Residence (County) | Mayes |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 John Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Duncan
Head · 1940 · age 67 · b. ~1873 · Oklahoma
★ 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 — Mayes-County, Oklahoma
Open full size
1940 US Federal Census — Mayes-County, Oklahoma
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03311-00405)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward L. Williamson | 1 | Grandson | — | Oklahoma |
| 42 | Claude W. Ragsdale | 42 | Head | Farmer | Oklahoma |
| 43 | Faye P. Ragsdale | 36 | Wife | — | Oklahoma |
| 44 | Naomi Ragsdale | 16 | Daughter | — | Oklahoma |
| 45 | Claude W. Ragsdale | 10 | Son | — | Oklahoma |
| 46 | Leloy Ragsdale | 6 | Son | — | Oklahoma |
| 47 | Mark D. Hanna | 57 | Head | Farmer | Oklahoma |
| 48 | Rebecca Hanna | 57 | Wife | — | Oklahoma |
| 49 | Virginia Hanna | 13 | Daughter | — | Oklahoma |
| 50 | Edward O. Hanna | 12 | Son | — | Oklahoma |
| 51 | Mary Jo Hanna | 11 | Daughter | — | Oklahoma |
| 52 | Johnnie Hanna | 10 | Son | — | Oklahoma |
| 53 | Frank L. Hanna | 3 | Son | — | Oklahoma |
| 54 | David A. Young | 62 | Head | Farmer | Arkansas |
| 55 | Louie N. Young | 46 | Wife | — | Missouri |
| 56 | Edgar L. Young | 25 | Son | Farmer | Oklahoma |
| 57 | Georgia A. Young | 20 | Daughter | — | Oklahoma |
| 58 | Dorthie R. Young | 13 | Daughter | — | Oklahoma |
| 59 | William L. Everman | 42 | Head | Farmer | Oklahoma |
| 60 | Ollie M. Everman | 32 | Wife | Cook - W.P.A. | Arkansas |
| 61 | Walter R. Everman | 18 | Son | — | Oklahoma |
| 62 | Troy W. Everman | 16 | Son | — | Oklahoma |
| 63 | Wilma L. Everman | 14 | Daughter | — | Oklahoma |
| 64 | David W. Everman | 8 | Son | — | Oklahoma |
| 65 | John C. Duncan THIS PERSON | 67 | Head | Farmer | Arkansas |
| 66 | Mary E. Duncan | 49 | Wife | — | Arkansas |
| 67 | John E. Duncan | 12 | Son | — | Oklahoma |
| 68 | Sarah E. Foster | 66 | Head | — | Arkansas |
| 69 | Ina J. Foster | 50 | Head | Farmer | Arkansas |
| 70 | Mary J. Foster | 24 | Wife | — | Oklahoma |
| 71 | Patricia A. Foster | 6 | Daughter | — | Oklahoma |
| 72 | Marilyn J. Foster | 4 | Daughter | — | Oklahoma |
| 73 | Mason H. Ferguson | 56 | Head | Farmer | Iowa |
| 74 | Hattie L. Ferguson | 48 | Wife | — | Nebraska |
| 75 | Mefine J. Ferguson | 18 | Daughter | — | Oklahoma |
| 76 | Verna D. Ferguson | 16 | Daughter | — | Oklahoma |
| 77 | Cecil E. Clifton | 31 | Head | Farmer | Oklahoma |
| 78 | Lois Clifton | 21 | Wife | — | Oklahoma |
| 79 | George W. Jenkins | 78 | Head | Farmer | Missouri |
| 80 | Elsa A. Jenkins | 75 | Wife | — | Missouri |
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)