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Mary Downey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Downey across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Downey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Swissvale |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | H-3 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Swissvale |
| 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 |
|---|---|---|---|---|
| Edgar Downey | Son | — | 14 | ~1926 |
| Mary Downey | Spouse | — | 36 | ~1904 |
| Donald Downey | Son | — | 5 | ~1935 |
| John Downey | Head | — | 42 | ~1898 |
| Mary Downey | Daughter | — | 16 | ~1924 |
| Jack Downey | Son | — | 15 | ~1925 |
| Richard Downey | Son | — | 10 | ~1930 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 5
Allegheny, Pennsylvania · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Downey |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 16
Allegheny-County, Pennsylvania · implied b. ~1924 — 7 household members
| Surname | Downey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Swissvale |
| 1935 Residence (County) | Allegheny |
| Highest Grade | H-3 |
| 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 Downey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Downey
Daughter · 1940 · age 16 · b. ~1924 · Pennsylvania
★ You are viewing this record
Sibling
Richard Downey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Downey
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Downey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edgar Downey
Sibling · 1940 · age 14
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-03418-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Minnie Swan | 56 | Wife | — | Germany |
| 42 | Geo Mcginn | 18 | Boarder | Labor | Pennsylvania |
| 43 | William Laney | 34 | Head | Service Station Attn. | Pennsylvania |
| 44 | Ruth Laney | 28 | Wife | — | Pennsylvania |
| 45 | Harold Musard | 30 | Head | Ins Salesman | Pennsylvania |
| 46 | Helen Musard | 24 | Wife | — | Pennsylvania |
| 47 | Nicholas Meyer | 30 | Head | Sales Clerk | Pennsylvania |
| 48 | Dorothy Meyer | 32 | Wife | — | Pennsylvania |
| 49 | Wayne Meyer | 8 | Son | — | Pennsylvania |
| 50 | Lawrence Meyer | 3 | Son | — | Pennsylvania |
| 51 | Claud L Logan | 65 | Head | Helper | Pennsylvania |
| 52 | Alice Logan | 61 | Wife | — | Pennsylvania |
| 53 | Irene Logan | 34 | Daughter | Stenographer | Pennsylvania |
| 54 | Charles Logan | 30 | Son | Laborer | Pennsylvania |
| 55 | Kenneth Logan | 27 | Son | Laborer | Pennsylvania |
| 56 | Eugene Logan | 21 | Son | — | Pennsylvania |
| 57 | Geneve Logan | 19 | Daughter | — | Pennsylvania |
| 58 | Elmer Heck | 31 | Head | Waiter | Pennsylvania |
| 59 | Ruth Heck | 28 | Wife | Stenographer | Pennsylvania |
| 60 | William Buckner | 34 | Head | Enforc. Officer | Pennsylvania |
| 61 | Blanche Buckner | 28 | Wife | — | Pennsylvania |
| 62 | Jimmy Buckner | 8 | Son | — | Pennsylvania |
| 63 | Henry Spagnola | 37 | Head | Mill Hand | Texas |
| 64 | Philomena Spagnola | 32 | Wife | — | Pennsylvania |
| 65 | Joseph Denton | 56 | Head | Officer | Italy |
| 66 | Concetta Denton | 42 | Wife | — | Italy |
| 67 | Giacenta Mercuri | 74 | Mother | — | Italy |
| 68 | John Downey | 42 | Head | Machinist | Pennsylvania |
| 69 | Mary Downey | 36 | Wife | — | Pennsylvania |
| 70 | Mary Downey THIS PERSON | 16 | Daughter | — | Pennsylvania |
| 71 | Jack Downey | 15 | Son | — | Pennsylvania |
| 72 | Edgar Downey | 14 | Son | — | Pennsylvania |
| 73 | Richard Downey | 10 | Son | — | Pennsylvania |
| 74 | Donald Downey | 5 | Son | — | Pennsylvania |
| 75 | Byron Maze | 32 | Head | Labor | Pennsylvania |
| 76 | Josephine Maze | 31 | Sister | File Clerk | Pennsylvania |
| 77 | Lida Maze | 3 | Daughter | Washer | Pennsylvania |
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)