MF
Mary Flaherty — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Flaherty across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Flaherty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | School Aid |
| Industry | Nat. Marketing Co |
| Class of Worker | W |
| Hours Worked | 28 |
| Income (1939) | 12 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | School Aid |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Patricia Flaherty | Daughter | — | 5 | ~1935 |
| James Flaherty | Son | — | 10 | ~1930 |
| Catherine Flaherty | Daughter | — | 11 | ~1929 |
| Frances Flaherty | Daughter | — | 16 | ~1924 |
| Margaret Flaherty | Daughter | — | 14 | ~1926 |
| Mary Flaherty | Daughter | — | 12 | ~1928 |
| Helen Flaherty | Daughter | — | 7 | ~1933 |
| Peter Flaherty | Head | — | 48 | ~1892 |
| Annie Flaherty | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1929 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flaherty |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 12
Allegheny-County, Pennsylvania · implied b. ~1928 — 9 household members
| Surname | Flaherty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Occupation | School Aid |
| Industry | Nat. Marketing Co |
| Class of Worker | W |
| Hours Worked | 28 |
| Income (1939) | 12 |
| Highest Grade | No 7 |
| 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 Flaherty across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Flaherty
Daughter · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Catherine Flaherty
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Flaherty
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Flaherty
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Flaherty
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Flaherty
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Flaherty
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
40 people indexed on this census page (nara:1940:m-t0627-03673-00818)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jeannette Tutek | 27 | Head | — | Pennsylvania |
| 42 | Lois Jean Tutek | 5 | Daughter | — | Pennsylvania |
| 43 | Ralph Mankin | 35 | Head | Clerk | Lithuania |
| 44 | Agnes Mankin | 34 | Wife | Butcher | Pennsylvania |
| 45 | James Russell | 57 | Head | Repairman | New York |
| 46 | Annie Russell | 58 | Wife | — | Scotland |
| 47 | Clementine Russell | 21 | Daughter | Stenographer | Pennsylvania |
| 48 | Peter Flaherty | 48 | Head | Clerk | Ireland |
| 49 | Annie Flaherty | 44 | Wife | — | Ireland |
| 50 | Mary Flaherty THIS PERSON | 12 | Daughter | School Aid | Pennsylvania |
| 51 | Frances Flaherty | 16 | Daughter | — | Pennsylvania |
| 52 | Margaret Flaherty | 14 | Daughter | — | Pennsylvania |
| 53 | Catherine Flaherty | 11 | Daughter | — | Pennsylvania |
| 54 | James Flaherty | 10 | Son | — | Pennsylvania |
| 55 | Helen Flaherty | 7 | Daughter | — | Pennsylvania |
| 56 | Patricia Flaherty | 5 | Daughter | — | Pennsylvania |
| 57 | Marie Mccallen | 48 | Head | Housework | Pennsylvania |
| 58 | William Cochran | 73 | Lodger | — | Pennsylvania |
| 59 | William Canavan | 70 | Head | — | Pennsylvania |
| 60 | Margaret Canavan | 45 | Wife | — | Pennsylvania |
| 61 | Barbara Long | 80 | Head | — | Pennsylvania |
| 62 | David Lewis | 27 | Head | Laborer | Pennsylvania |
| 63 | Mary Lewis | 28 | Wife | — | Pennsylvania |
| 64 | Frank Currie | 50 | Head | Policeman | West Virginia |
| 65 | Alice Currie | 45 | Wife | — | Ireland |
| 66 | Robert Currie | 22 | Son | Clerk | Pennsylvania |
| 67 | Gloria Currie | 15 | Daughter | — | Pennsylvania |
| 68 | John Currie | 8 | Son | — | Pennsylvania |
| 69 | Barry Currie | 5 | Son | — | Pennsylvania |
| 70 | Robert Quinn | 46 | Head | Salesman | Pennsylvania |
| 71 | Cecelia Quinn | 37 | Wife | — | Indiana |
| 72 | Frank Alessio | 45 | Head | Proprietor | Italy |
| 73 | Victoria Alessio | 40 | Wife | — | Italy |
| 74 | Antoinette Alessio | 20 | Daughter | New Worker | Pennsylvania |
| 75 | Thomas Alessio | 15 | Son | — | Pennsylvania |
| 76 | Mary Alessio | 12 | Daughter | — | Pennsylvania |
| 77 | Frank Alessio | 9 | Son | — | Pennsylvania |
| 78 | James Alessio | 2 | Son | — | Pennsylvania |
| 79 | Mary Laphina | 60 | Head | — | Italy |
| 80 | George Donatelli | 26 | Head | Proprietor | 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)