MD
Mary Douglas — 1930 US Census Record
Model Tree available1930 United States Federal Census · Porter, Indiana
Our Model Tree links this Mary Douglas across the 1910, 1920 and 1930 US Censuses in Porter, Indiana (XGBoost, ~Confirmed), with identified parents George & Maud — first a daughter (b.~1909), then head of a 5-person household.
Age 21
b. ~1909
Female
Daughter
Born: Indiana
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Porter, Indiana |
| Surname | Douglas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| Age at First Marriage | 21 |
| Father's Birthplace | Canada |
| Mother's Birthplace | Michigan |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Valparaiso City |
| Est. Birth Year | ~1909 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Douglas | Daughter | — | 21 | ~1909 |
| George Douglas | Head | — | 56 | ~1874 |
| Herbert Douglas | Son | — | 24 | ~1906 |
| George Douglas | Son | — | 24 | ~1906 |
| Maud Douglas | Spouse | — | 54 | ~1876 |
Census Appearances
1910
Porter, Indiana
Daughter, age 1
Porter, Indiana · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Canada |
| Mother's Birthplace | Michigan |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1920
Porter, Indiana
Daughter, age 11
Porter, Indiana · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Canada |
| Mother's Birthplace | Michigan |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Porter, Indiana
Daughter, age 21
Porter, Indiana · implied b. ~1909 — 5 household members
| Surname | Douglas |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| Age at First Marriage | 21 |
| Father's Birthplace | Canada |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| 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 Douglas across 3 US Census years (1910, 1920 and 1930) in Porter, Indiana, using XGBoost record linkage. Identified parents: father George Douglas (~0.92 confidence) and mother Maud Douglas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Douglas
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Maud Douglas
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Douglas
Daughter · 1930 · age 21 · b. ~1909 · Indiana
★ You are viewing this record
Sibling
George Douglas
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Douglas
Sibling · 1930 · age 24
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
1930 US Federal Census — Porter, Indiana
Open full size
1930 US Federal Census — Porter, Indiana
Page Contents
50 people indexed on this census page (ia:1930:indianacensus00reel622:0692)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles A Dalrymple | 25 | Nephew | None | Indiana |
| 2 | Richard Wolfe | 73 | Head | Retail Merchant | Ohio |
| 3 | Ida M Wolfe | 57 | Wife | None | Pennsylvania |
| 4 | Cicily Knott | 59 | Head | None | Massachusetts |
| 5 | Cedric Knott | 25 | Son | Laborer | New York |
| 6 | Mary Hebron | 75 | Mother | None | Newfoundland |
| 7 | Amelia Kilpatrick | 64 | Head | Sewing | Illinois |
| 8 | Oscar Martin | 47 | Head | Janitor | Indiana |
| 9 | Carrie Martin | 48 | Wife | None | Indiana |
| 10 | Maxine Martin | 17 | Daughter | None | Indiana |
| 11 | George Martin | 10 | Son | None | Indiana |
| 12 | Grydon Morris | 70 | Father-in-law | Janitor | Indiana |
| 13 | Lottie Morris | 40 | Sister-in-law | Assistant | Indiana |
| 14 | Patrick Clifford | 70 | Head | Contractor | Indiana |
| 15 | Kathryn Clifford | 62 | Wife | None | Indiana |
| 16 | Walter Clifford | 39 | Head | Contractor | Indiana |
| 17 | Alma Clifford | 48 | Wife | None | Illinois |
| 18 | Jeanne Clifford | 13 | Daughter | None | Indiana |
| 19 | Terrence Clifford | 5 | Son | None | Indiana |
| 20 | Mildred Chael | 19 | Maid | Servant | Indiana |
| 21 | Elsie Blake | 40 | Head | Keeper | Illinois |
| 22 | Wallace Blake | 12 | Son | None | Indiana |
| 23 | Frank M Clifford | 36 | Head | Contractor | Indiana |
| 24 | Moushelle Clifford | 31 | Wife | None | Indiana |
| 25 | Irene Clifford | 9 | Daughter | None | Indiana |
| 26 | Charles Clifford | 7 | Son | None | Indiana |
| 27 | Ida Ruff | 33 | Maid | Servant | Indiana |
| 28 | Charles Foster | 26 | Head | Contractor | Indiana |
| 29 | Thelma Foster | 22 | Wife | None | Indiana |
| 30 | Shirley Foster | 2 | Daughter | None | Indiana |
| 31 | George Schutz | 50 | Head | Clergyman | Germany |
| 32 | Rose B Schutz | 45 | Wife | None | Indiana |
| 33 | Charles Anderson | 29 | Lodger | Instructor | Minnesota |
| 34 | William G Murdle | 80 | Head | Retail Merchant | Indiana |
| 35 | Katherine E Murdle | 76 | Wife | None | Illinois |
| 36 | Elizabeth Mallett | 45 | Maid | Servant | Wisconsin |
| 37 | George R Douglas | 56 | Head | Physician | Canada |
| 38 | Maud Douglas | 54 | Wife | None | Michigan |
| 39 | Herbert Douglas | 24 | Son | Machinist | Oklahoma |
| 40 | George Douglas | 24 | Son | None | Oklahoma |
| 41 | Mary Douglas THIS PERSON | 21 | Daughter | None | Indiana |
| 42 | Maurice Lowenstine | 54 | Head | Retail Merchant | Illinois |
| 43 | Etta Lowenstine | 50 | Wife | None | Colorado |
| 44 | John Lowenstine | 22 | Son | Merchant | Indiana |
| 45 | Maurice Jr Lowenstine | 19 | Son | None | Indiana |
| 46 | Mandel Lowenstine | 48 | Head | Merchant | Illinois |
| 47 | Daisy Lowenstine | 43 | Wife | None | Illinois |
| 48 | Mandel Jr Lowenstine | 7 | Son | None | Illinois |
| 49 | Bess Ruff | 36 | Servant | Housework | Missouri |
| 50 | Blanche Ruff | 27 | Servant | Cook | Illinois |
Related Census Records
Pedigree Summary
Mary + 2 siblings
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 1930 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)