MD
Mary Duke — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Blount-County, Alabama
Our Model Tree links this Mary Duke across the 1930 and 1940 US Censuses in Blount-County, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blount-County, Alabama |
| Surname | Duke |
| Given Name | Mary Nelle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Oneonta town |
| 1935 Residence (County) | Blount |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Oneonta Town |
| Est. Birth Year | ~1926 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Sally Duke | Spouse | — | 51 | ~1889 |
| Rud Savage | Other | — | 21 | ~1919 |
| Mary Duke | Daughter | — | 14 | ~1926 |
| Sarah Duke | Daughter | — | 8 | ~1932 |
| William Duke | Head | — | 62 | ~1878 |
| Ray Duke | Son | — | 19 | ~1921 |
Census Appearances
1930
Blount, Alabama
Daughter, age 4
Blount, Alabama · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duke |
| Given Name | Mary N. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Can Read/Write | No |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Blount-County, Alabama
Daughter, age 14
Blount-County, Alabama · implied b. ~1926 — 6 household members
| Surname | Duke |
| Given Name | Mary Nelle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Oneonta town |
| 1935 Residence (County) | Blount |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Mary Duke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duke
Daughter · 1940 · age 14 · b. ~1926 · Alabama
★ You are viewing this record
Sibling
Sarah Duke
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ray Duke
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 — Blount-County, Alabama
Open full size
1940 US Federal Census — Blount-County, Alabama
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00005-00744)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter D. Walker | 48 | Head | Laborer | Alabama |
| 2 | Canie B. Walker | 43 | Wife | — | Georgia |
| 3 | Ida R. Walker | 21 | Daughter | N.Y.A. Assistant | Alabama |
| 4 | Ollie B. Walker | 19 | Daughter | N.Y.A. Student | Alabama |
| 5 | Bonnie D. Walker | 16 | Daughter | — | Alabama |
| 6 | Walter Jr. Walker | 14 | Son | — | Alabama |
| 7 | Jack A. Walker | 11 | Son | — | Alabama |
| 8 | Oza W. Grigsby | 34 | Head | Laborer | Alabama |
| 9 | Gladys K. Grigsby | 29 | Wife | — | W. Virginia |
| 10 | Eleanor J. Grigsby | 8 | Daughter | — | W. Virginia |
| 11 | Charles E. Thomas | 61 | Head | Superintendent | Missouri |
| 12 | Rosa B. Thomas | 61 | Wife | — | Missouri |
| 13 | Benjamin F. Thomas | 50 | Head | Lumber Inspector | Missouri |
| 14 | Ermar Thomas | 50 | Wife | — | Alabama |
| 15 | Ermar Jean Thomas | 10 | Daughter | — | Alabama |
| 16 | William C. Owen | 31 | Head | Attendant | Alabama |
| 17 | Maxie Owen | 26 | Wife | — | Alabama |
| 18 | Sabra Lou Owen | 9 | Daughter | — | Alabama |
| 19 | Betty Sue Owen | 6 | Daughter | — | Alabama |
| 20 | Ernest Owen | 2 | Son | — | Alabama |
| 21 | William G. Duke | 62 | Head | Farmer | Georgia |
| 22 | Sally Duke | 51 | Wife | — | Georgia |
| 23 | Ray Duke | 19 | Son | Attendant | Alabama |
| 24 | Mary Nelle Duke THIS PERSON | 14 | Daughter | — | Alabama |
| 25 | Sarah Duke | 8 | Daughter | — | Alabama |
| 26 | Rud Savage | 21 | Lodger | Laborer | Alabama |
| 27 | James M. Gill | 55 | Head | — | Alabama |
| 28 | Genevie Gill | 47 | Wife | — | Alabama |
| 29 | Willard Gill | 24 | Head | Printer | Alabama |
| 30 | Mary Lyn Gill | 19 | Wife | — | Alabama |
| 31 | Patricia Lynn Gill | 1 | Daughter | — | Alabama |
| 32 | Erma G. Hall | 32 | Head | Truck Driver | Alabama |
| 33 | Edna Hall | 27 | Wife | — | Alabama |
| 34 | Doris Hall | 7 | Daughter | — | Alabama |
| 35 | Robert R. Valack | 30 | Head | Police | Alabama |
| 36 | Zora V. Valack | 26 | Wife | — | Alabama |
| 37 | Sara Valack | 5 | Daughter | — | Alabama |
| 38 | Robert Valack | 1 | Son | — | Alabama |
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)