MC
Mary Cronin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Cronin across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 2-person household.
Age 66
b. ~1874
Female
Head
Born: Scotland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Crafton Borough |
| 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Cronin | Head | — | 66 | ~1874 |
| Mary Cronin | Daughter | — | 45 | ~1895 |
Census Appearances
1920
Allegheny, Pennsylvania
Head, age 43
Allegheny, Pennsylvania · implied b. ~1877 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Cleaning |
| Industry | Theater |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1891 |
| Birthplace (normalized) | scotland |
1930
Allegheny, Pennsylvania
Head, age 53
Allegheny, Pennsylvania · implied b. ~1877 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 25.00 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Allegheny-County, Pennsylvania
Head, age 66
Allegheny-County, Pennsylvania · implied b. ~1874 — 2 household members
| Surname | Cronin |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Cronin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cronin
Head · 1940 · age 66 · b. ~1874 · 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-t0627-03401-00475)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary B. Smith | 30 | Wife | — | Pennsylvania |
| 2 | Sarah Marie Smith | 1 | Daughter | — | Pennsylvania |
| 3 | Bernard Wagner | 35 | Head | Architect | New York |
| 4 | Dorothy Wagner | 30 | Wife | — | Pennsylvania |
| 5 | George S. Parker | 27 | Head | Steel Roller | Ohio |
| 6 | Dorothy Parker | 26 | Wife | — | Ohio |
| 7 | Dorothy Parker | 2 | Daughter | — | Pennsylvania |
| 8 | George Jr. Parker | 0 | Son | — | Pennsylvania |
| 9 | Mary Cronin THIS PERSON | 66 | Head | — | Scotland |
| 10 | Mary Margaret Cronin | 45 | Daughter | Office Filing Clerk | Pennsylvania |
| 11 | John E. Prior | 47 | Head | Mechanical Engineer | Pennsylvania |
| 12 | Myrtle Prior | 41 | Wife | Teacher | Oklahoma |
| 13 | Edward Mueller | 38 | Head | Clerk | Pennsylvania |
| 14 | Esther M. Mueller | 43 | Wife | — | Pennsylvania |
| 15 | Raymond A. Mueller | 14 | Son | — | Pennsylvania |
| 16 | William J. Mueller | 12 | Son | — | Pennsylvania |
| 17 | Mary R. Mueller | 10 | Daughter | — | Pennsylvania |
| 18 | Robert J. Mueller | 6 | Son | — | Pennsylvania |
| 19 | Albert Streebeck | 57 | Head | Meat Merchant | Pennsylvania |
| 20 | Eleanor Streebeck | 55 | Wife | — | Pennsylvania |
| 21 | Ralph Herman Davidson | 27 | Head | Retail Salesman | Illinois |
| 22 | Helen Davidson | 24 | Wife | Secretary | Illinois |
| 23 | Thomas Pitch | 27 | Head | Laborer | Pennsylvania |
| 24 | Sylvia Pitch | 23 | Wife | Stenographer | Pennsylvania |
| 25 | Harry Irwin | 35 | Head | Druggist | Pennsylvania |
| 26 | Vie Irwin | 28 | Wife | Bookkeeper | Pennsylvania |
| 27 | Harry Joyce | 26 | Head | Assistant Foreman | Pennsylvania |
| 28 | Margaret Joyce | 25 | Wife | — | Pennsylvania |
| 29 | William R. Fries | 26 | Head | W-R Salesman | New York |
| 30 | Shirley Fries | 27 | Wife | — | New York |
| 31 | John Wyeth | 26 | Head | W-R Salesman | Ohio |
| 32 | Marguerite Wyeth | 24 | Wife | — | Pennsylvania |
| 33 | John T. Mosher | 34 | Head | Agent | Ohio |
| 34 | Anna Mosher | 31 | Wife | Hosiery Machine Operator | Pennsylvania |
| 35 | J. Raymond Aston | 30 | Head | Accounting Clerk | Pennsylvania |
| 36 | Louise Aston | 28 | Wife | Telephone Operator | Pennsylvania |
| 37 | Bridget Donley | 68 | Head | — | Ireland |
| 38 | Charles Donley | 36 | Son | Laborer | Pennsylvania |
| 39 | Joseph Wilson | 27 | Head | Clerk | Ohio |
| 40 | Nellie Wilson | 27 | Wife | Clerk | 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)