MH
Mary Harrison — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Harrison across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 5-person household.
Age 66
b. ~1874
Female
Head
Born: Wales
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Wales |
| 1935 Residence (City) | Wilkins Twp |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Janitress |
| Industry | Office building |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
| Occupation | Janitress |
| Township / Ward | Wilkins Twp |
| Est. Birth Year | ~1874 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruth Hopes | Daughter | — | 24 | ~1916 |
| La Hopes | Daughter | — | 17 | ~1923 |
| Mary Harrison | Head | — | 66 | ~1874 |
| William Hopes | Other | — | 26 | ~1914 |
| William Hopes | Other | — | 50 | ~1890 |
Census Appearances
1920
Allegheny, Pennsylvania
Other, age 48
Allegheny, Pennsylvania · implied b. ~1872 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Boarder |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Widowed |
| Birthplace | Wales |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Janitress |
| Industry | Electric Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Welsh |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1930
Allegheny, Pennsylvania
Head, age 58
Allegheny, Pennsylvania · implied b. ~1872 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | Wales |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Janitor |
| Industry | Electric Mfg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
1940
Allegheny-County, Pennsylvania
Head, age 66
Allegheny-County, Pennsylvania · implied b. ~1874 — 5 household members
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Wales |
| 1935 Residence (City) | Wilkins Twp |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Occupation | Janitress |
| Industry | Office building |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth Country | Wales |
| Birthplace (normalized) | wales |
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 Harrison across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrison
Head · 1940 · age 66 · b. ~1874 · Pennsylvania
★ You are viewing this record
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-t0627-03420-00918)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Short | 26 | Head | Labour | Pennsylvania |
| 2 | Jack Short | 2 | Grandson | 0 | Pennsylvania |
| 3 | Walter Short | 28 | Son | Labourer | Pennsylvania |
| 4 | Agnes Short | 24 | Daughter in law | — | Pennsylvania |
| 5 | Marlene J. Short | 2 | Granddaughter | 0 | Pennsylvania |
| 6 | William Strenko | 25 | Head | Labourer | Pennsylvania |
| 7 | Catherine Strenko | 22 | Wife | — | Pennsylvania |
| 8 | Clifford Strenko | 4 | Son | 0 | Pennsylvania |
| 9 | Audrey Strenko | 2 | Daughter | 0 | Pennsylvania |
| 10 | Mary Harrison THIS PERSON | 66 | Head | Janitress | Wales |
| 11 | William Hopes | 50 | Son in law | Labourer | Ohio |
| 12 | William D. Hopes | 26 | Grandson | Core Maker | Pennsylvania |
| 13 | Ruth Hopes | 24 | Daughter | — | Pennsylvania |
| 14 | La Verne Hopes | 17 | Daughter | — | Pennsylvania |
| 15 | Nicholas Martinelli | 58 | Head | Labour | Italy |
| 16 | Mary Martinelli | 48 | Wife | — | Italy |
| 17 | Mary Martinelli | 19 | Daughter | — | Italy |
| 18 | Josephine Martinelli | 15 | Daughter | — | Pennsylvania |
| 19 | Francis Martinelli | 11 | Daughter | — | Pennsylvania |
| 20 | George Damico | 66 | Head | Laborer | Italy |
| 21 | Concetta Damico | 60 | Wife | — | Italy |
| 22 | Anna Damico | 26 | Daughter | File Clerk | Pennsylvania |
| 23 | Rose Damico | 20 | Daughter | — | Pennsylvania |
| 24 | Benjardi Damico | 33 | Head | Electrical Welder | Pennsylvania |
| 25 | Catherine Damico | 23 | Wife | — | Pennsylvania |
| 26 | Willard Damico | 2 | Son | 0 | Pennsylvania |
| 27 | John Bichsel | 65 | Head | Laborer | Pennsylvania |
| 28 | Anna Bichsel | 55 | Wife | — | Pennsylvania |
| 29 | James Bichsel | 20 | Son | New Worker | Pennsylvania |
| 30 | Thomas Bichsel | 18 | Son | — | Pennsylvania |
| 31 | Earl Bichsel | 16 | Son | — | Pennsylvania |
| 32 | John Jr. Bichsel | 27 | Son | Laborer | Pennsylvania |
| 33 | Eleanor Bichsel | 22 | Daughter in law | — | Pennsylvania |
| 34 | Ronald Bichsel | 0 | Grandson | 0 | Pennsylvania |
| 35 | William M. Bichsel | 24 | Head | Laborer | Pennsylvania |
| 36 | Rose B. Bichsel | 22 | Wife | — | Pennsylvania |
| 37 | Josephine Bichsel | 0 | Daughter | 0 | Pennsylvania |
| 38 | Joseph Getcko | 28 | Head | Draftsman | Pennsylvania |
| 39 | Alda Getcko | 23 | Wife | — | Pennsylvania |
| 40 | Alda Getcko | 3 | Daughter | 0 | 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)