MD
Mary Douglas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Douglas across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 10-person household.
Age 38
b. ~1902
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Douglas |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1902 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Douglas | Daughter | — | 16 | ~1924 |
| Nathan Douglas | Daughter | — | 11 | ~1929 |
| Hilda Douglas | Daughter | — | 21 | ~1919 |
| George Douglas | Head | — | 48 | ~1892 |
| Ernest Epps | Other | — | 39 | ~1901 |
| William Douglas | Son | — | 15 | ~1925 |
| Ernest Douglas | Son | — | 13 | ~1927 |
| George Douglas | Son | — | 19 | ~1921 |
| John Douglas | Son | — | 6 | ~1934 |
| Mary Douglas | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 29
Allegheny, Pennsylvania · implied b. ~1901 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Douglas |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 18 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Spouse, age 38
Allegheny-County, Pennsylvania · implied b. ~1902 — 10 household members
| Surname | Douglas |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Douglas
Spouse · 1940 · age 38 · b. ~1902 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03660-00116)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Luigi Raymondo | 51 | Head | Huckster | Italy |
| 2 | Teresa Raymondo | 35 | Wife | — | Italy |
| 3 | Joseph Raymondo | 17 | Son | — | Pennsylvania |
| 4 | Catherine Raymondo | 11 | Daughter | — | Pennsylvania |
| 5 | Josephine Whalen | 62 | Head | Beauty Operator | Pennsylvania |
| 6 | Florence Slack | 45 | Sister | Beauty Operator | Pennsylvania |
| 7 | Namyne Slack | 50 | Sister | Floor Lady | Pennsylvania |
| 8 | Herbert Lunger | 42 | Head | Truck Driver | Pennsylvania |
| 9 | Sarah D. Lunger | 42 | Wife | — | Pennsylvania |
| 10 | Dorothy Mildred Lunger | 20 | Daughter | Stenographer | Pennsylvania |
| 11 | Kenneth T. Moore | 31 | Head | Truck Driver | Pennsylvania |
| 12 | Hazel Moore | 25 | Wife | — | Pennsylvania |
| 13 | Carol Ann Moore | 1 | Daughter | — | Pennsylvania |
| 14 | Peter Alfieri | 43 | Head | Salesman | Italy |
| 15 | Catherine Alfieri | 40 | Wife | Saleslady | Pennsylvania |
| 16 | Anthony Alfieri | 17 | Son | Laborer | Pennsylvania |
| 17 | Anita Alfieri | 15 | Daughter | — | Pennsylvania |
| 18 | George A. Douglas | 48 | Head | Custodian | Pennsylvania |
| 19 | Mary E. Douglas THIS PERSON | 38 | Wife | — | Pennsylvania |
| 20 | Hilda Douglas | 21 | Daughter | House Keeper | Pennsylvania |
| 21 | George Jr. Douglas | 19 | Son | New Worker | Pennsylvania |
| 22 | Mary Frances Douglas | 16 | Daughter | — | Pennsylvania |
| 23 | William Douglas | 15 | Son | — | Pennsylvania |
| 24 | Ernest Douglas | 13 | Son | — | Pennsylvania |
| 25 | Nathan Douglas | 11 | Daughter | — | Pennsylvania |
| 26 | John Douglas | 6 | Son | — | Pennsylvania |
| 27 | Ernest Epps | 39 | Lodger | Custodian | Missouri |
| 28 | James H. Mccafferty | 38 | Head | Truck Driver | Pennsylvania |
| 29 | Irene Mccafferty | 36 | Wife | Bookkeeper | Pennsylvania |
| 30 | Elmer Henry Harvey | 59 | Head | Custodian | Virginia |
| 31 | Clara Harvey | 49 | Wife | Maid | Virginia |
| 32 | William Roberts | 46 | Lodger | Chauffer | Georgia |
| 33 | Joseph E. Lewis | 35 | Head | Salesman | Pennsylvania |
| 34 | Thelma A. Lewis | 35 | Wife | — | Maryland |
| 35 | Gail Jean Lewis | 5 | Daughter | — | Pennsylvania |
| 36 | W. F. Karthausen | 40 | Head | Brakeman | Pennsylvania |
| 37 | Florence E. Karthausen | 34 | Wife | — | Pennsylvania |
| 38 | Margaret Jane Karthausen | 8 | Daughter | — | Pennsylvania |
| 39 | Fred W. Roberts | 61 | Father-in-law | Painter | Canada |
| 40 | Carrie Smith | 63 | Head | Laundress | Virginia |
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)