MD
Mary Duke — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Indiana
Our Model Tree links this Mary Duke across the 1930 and 1940 US Censuses in Delaware-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Indiana |
| Surname | Duke |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Muncie |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Muncie |
| Est. Birth Year | ~1924 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rolland Duke | Son | — | 10 | ~1930 |
| Richard Duke | Son | — | 21 | ~1919 |
| Edith Duke | Spouse | — | 47 | ~1893 |
| Elmer Duke | Head | — | 48 | ~1892 |
| Mary Duke | Daughter | — | 16 | ~1924 |
| Betty Duke | Daughter | — | 13 | ~1927 |
| Billy Duke | Son | — | 9 | ~1931 |
Census Appearances
1930
Delaware, Indiana
Daughter, age 6
Delaware, Indiana · implied b. ~1924 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duke |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Delaware-County, Indiana
Daughter, age 16
Delaware-County, Indiana · implied b. ~1924 — 7 household members
| Surname | Duke |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Muncie |
| 1935 Residence (County) | Delaware |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 16 · b. ~1924 · Indiana
★ You are viewing this record
Sibling
Betty Duke
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Billy Duke
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rolland Duke
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Duke
Sibling · 1940 · age 21
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 — Delaware-County, Indiana
Open full size
1940 US Federal Census — Delaware-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01037-01023)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nancy Waters | 71 | Head | — | Indiana |
| 2 | Minerva Waters | 63 | Sister | — | Indiana |
| 3 | Adeline Waters | 60 | Sister | Art Supervisor | Indiana |
| 4 | Clinton Gates | 60 | Head | — | Indiana |
| 5 | Ollie Gates | 47 | Wife | Cook | Indiana |
| 6 | Mary Catherine Gates | 22 | Daughter | Nurse Aid | Indiana |
| 7 | Lucille Emsley | 30 | Cousin | Stenographer | Indiana |
| 8 | Frederick Wilson | 59 | Head | Electrician | Indiana |
| 9 | Pauline Wilson | 39 | Wife | — | Indiana |
| 10 | Caroline Wilson | 12 | Daughter | — | Indiana |
| 11 | William Meeker | 32 | Lodger | — | Indiana |
| 12 | Nellie Carr | 66 | Head | — | Kentucky |
| 13 | William Johnson | 27 | Lodger | Laborer | Indiana |
| 14 | Gillion Dalton | 26 | Head | Waiter | Illinois |
| 15 | Margie Dalton | 26 | Wife | — | Indiana |
| 16 | Dean Dalton | 7 | Son | — | Indiana |
| 17 | Allen Dalton | 6 | Son | — | Indiana |
| 18 | David Dalton | 2 | Son | — | Indiana |
| 19 | Edwin Atherton | 26 | Head | Laborer | Indiana |
| 20 | Martha Atherton | 24 | Wife | — | Indiana |
| 21 | Gary Atherton | 3 | Son | — | Indiana |
| 22 | Elmer Duke | 48 | Head | Laborer | Ohio |
| 23 | Edith Duke | 47 | Wife | — | Indiana |
| 24 | Richard Duke | 21 | Son | Truck Driver | Indiana |
| 25 | Mary Duke THIS PERSON | 16 | Daughter | — | Indiana |
| 26 | Betty Duke | 13 | Daughter | — | Indiana |
| 27 | Rolland Duke | 10 | Son | — | Indiana |
| 28 | Billy Duke | 9 | Son | — | Indiana |
| 29 | John Karanak | 49 | Head | General Superintendent | Pennsylvania |
| 30 | Anna Karanak | 49 | Wife | — | Indiana |
| 31 | George Karanak | 18 | Son | Tool Maker | Indiana |
| 32 | Robert Karanak | 15 | Son | — | Indiana |
| 33 | Jean Karanak | 9 | Daughter | — | Indiana |
| 34 | Oral Lewis | 27 | Son-in-law | Machinist | Indiana |
| 35 | Pauline Lewis | 22 | Daughter | Packer | Indiana |
| 36 | Samuel Ash | 66 | Head | — | Indiana |
| 37 | Bonnie Ash | 62 | Wife | — | Ohio |
| 38 | Charles Sims | 33 | Head | Display Advertising | Indiana |
| 39 | Virginia Sims | 29 | Wife | — | Indiana |
| 40 | Wilbur Sims | 68 | Father | — | Indiana |
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)