MD
Mary Dudley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Mary Dudley across the 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Dudley |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Martha Dudley | Daughter | — | 6 | ~1934 |
| Robert Dudley | Son | — | 8 | ~1932 |
| Ellie Dudley | Spouse | — | 32 | ~1908 |
| Mary Dudley | Daughter | — | 10 | ~1930 |
| Allen Dudley | Head | — | 37 | ~1903 |
| Joseph Dudley | Son | — | 1 | ~1939 |
| Paul Dudley | Son | — | 12 | ~1928 |
| Ruth Dudley | Daughter | — | 4 | ~1936 |
Census Appearances
1930
Marion, Indiana
Daughter, age
Marion, Indiana · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dudley |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | New York |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 10
Marion-County, Indiana · implied b. ~1930 — 8 household members
| Surname | Dudley |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Highest Grade | No 4 |
| 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 Dudley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dudley
Daughter · 1940 · age 10 · b. ~1930 · Indiana
★ You are viewing this record
Sibling
Martha Dudley
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Dudley
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Dudley
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Dudley
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Dudley
Sibling · 1940 · age 8
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01124-00088)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Parthenia Shelton | 81 | Mother-in-law | — | Ohio |
| 43 | Elbert Scott | 50 | Head | New Worker | Tennessee |
| 44 | James Scott | 19 | Son | House Wiring Man | Indiana |
| 45 | Robert Scott | 20 | Son | House Wiring Man | Indiana |
| 46 | Harold Scott | 18 | Son | — | Indiana |
| 47 | Mildred Scott | 16 | Daughter | — | Indiana |
| 48 | Kate Phillips | 64 | Head | Domestic | Indiana |
| 49 | Stanley Libert | 50 | Head | Stock Clerk | Indiana |
| 50 | Ethel Libert | 54 | Wife | — | Indiana |
| 51 | James B. Libert | 22 | Son | Truck Driver | Indiana |
| 52 | Irene Libert | 22 | Daughter-in-law | — | Indiana |
| 53 | James B. Jr. Libert | 0 | Grandson | — | Indiana |
| 54 | Carl Prim | 58 | Head | Laborer | Indiana |
| 55 | Beatrice Prim | 53 | Wife | — | Indiana |
| 56 | Harold Prim | 17 | Son | — | Indiana |
| 57 | Estelle Duran | 29 | Daughter | Domestic | Indiana |
| 58 | Frank Williams | 21 | Head | Car Washer | Indiana |
| 59 | Anna Williams | 17 | Wife | — | Tennessee |
| 60 | Paul J. Williams | 1 | Son | — | Indiana |
| 61 | Robert Williams | 0 | Son | — | Indiana |
| 62 | Katie Williams | 47 | Mother-in-law | Domestic | Tennessee |
| 63 | Allen Dudley | 37 | Head | General Builder | New York |
| 64 | Ellie May Dudley | 32 | Wife | — | Indiana |
| 65 | Paul J. Dudley | 12 | Son | — | Indiana |
| 66 | Mary L. Dudley THIS PERSON | 10 | Daughter | — | Indiana |
| 67 | Robert A. Dudley | 8 | Son | — | Indiana |
| 68 | Martha M. Dudley | 6 | Daughter | — | Indiana |
| 69 | Ruth E. Dudley | 4 | Daughter | — | Indiana |
| 70 | Joseph M. Dudley | 1 | Son | — | Indiana |
| 71 | Marion Willis | 34 | Head | Truck Loader | Mississippi |
| 72 | Jessie Willis | 30 | Wife | — | Mississippi |
| 73 | Letha Willis | 12 | Daughter | — | Indiana |
| 74 | Nellie Willis | 10 | Daughter | — | Indiana |
| 75 | Odessa Willis | 8 | Daughter | — | Indiana |
| 76 | Louie Willis | 6 | Daughter | — | Indiana |
| 77 | Marion, Jr. Willis | 4 | Son | — | Indiana |
| 78 | Betty Willis | 0 | Daughter | — | Indiana |
| 79 | William Smith | 46 | Head | Truck Driver | Mississippi |
| 80 | Jackie Smith | 31 | Wife | — | Ohio |
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)