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Mary Mcgrath — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Mcgrath across the 1920 and 1930 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 14-person household.
Age 10
b. ~1920
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1920 |
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.
14 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rebecca Mcgrath | Daughter | — | 3 | ~1927 |
| Anna Mcgrath | Daughter | — | 4 | ~1926 |
| Mary Mcgrath | Daughter | — | 10 | ~1920 |
| Helen Mcgrath | Daughter | — | 11 | ~1919 |
| Margaret Mcgrath | Daughter | — | 1 | ~1929 |
| Wm Mcgrath | Head | — | 30 | ~1900 |
| John Mcgrath | Other | — | 38 | ~1892 |
| Benj Lennon | Other | — | 67 | ~1863 |
| Joseph Hackman | Other | — | 21 | ~1909 |
| Michael Hackman | Other | — | 22 | ~1908 |
| John Mcgrath | Son | — | 5 | ~1925 |
| Thomas Mcgrath | Son | — | 7 | ~1923 |
| Wm Mcgrath | Son | — | 12 | ~1918 |
| Agnes Mcgrath | Spouse | — | 30 | ~1900 |
Census Appearances
1920
Philadelphia, Pennsylvania
Daughter, age
Philadelphia, Pennsylvania · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 10
Philadelphia, Pennsylvania · implied b. ~1920 — 14 household members
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| 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 Mcgrath across 2 US Census years (1920 and 1930) in Philadelphia, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcgrath
Daughter · 1930 · age 10 · b. ~1920 · Pennsylvania
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Sibling
Margaret Mcgrath
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mcgrath
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mcgrath
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Mcgrath
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wm Mcgrath
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcgrath
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rebecca Mcgrath
Sibling · 1930 · age 3
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
1930 US Federal Census — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2098:0975)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Asa Shaw | 63 | Head | Cup-Maker | New Hampshire |
| 2 | Wm Mcgrath | 30 | Head | Chauffeur | Pennsylvania |
| 3 | Agnes Mcgrath | 30 | Wife | — | Pennsylvania |
| 4 | Wm Mcgrath | 12 | Son | — | Pennsylvania |
| 5 | Helen Mcgrath | 11 | Daughter | — | Pennsylvania |
| 6 | Mary Mcgrath THIS PERSON | 10 | Daughter | — | Pennsylvania |
| 7 | Thomas Mcgrath | 7 | Son | — | Pennsylvania |
| 8 | John Mcgrath | 5 | Son | — | Pennsylvania |
| 9 | Anna Mcgrath | 4 | Daughter | — | Pennsylvania |
| 10 | Rebecca Mcgrath | 3 | Daughter | — | Pennsylvania |
| 11 | Margaret Mcgrath | 1 | Daughter | — | Pennsylvania |
| 12 | John Mcgrath | 38 | Brother | Laborer | Pennsylvania |
| 13 | Michael Hackman | 22 | Bro-law | Shipper | Pennsylvania |
| 14 | Joseph Hackman | 21 | Bro-law | Helper | Pennsylvania |
| 15 | Benj. Lennon | 67 | Lodger | Laborer | Pennsylvania |
| 16 | Joseph Testa | 35 | Head | Barber | Pennsylvania |
| 17 | Sophie Testa | 63 | Mother | — | Poland |
| 18 | Michael Testa | 23 | Brother | Puncher | Pennsylvania |
| 19 | John Testa | 22 | Brother | Machinist | Pennsylvania |
| 20 | Vincent Imperatore | 45 | Head | Barber | Italy |
| 21 | Rose Imperatore | 43 | Wife | — | Italy |
| 22 | Marie Imperatore | 18 | Daughter | — | Pennsylvania |
| 23 | Rose Imperatore | 12 | Daughter | — | Pennsylvania |
| 24 | Walter Williams | 50 | Head | Exterminator | England |
| 25 | Mary Williams | 32 | Wife | Saleslady | Pennsylvania |
| 26 | Walter Williams | 7 | Son | — | Pennsylvania |
| 27 | Mary Williams | 1 | Daughter | — | Pennsylvania |
| 28 | Thos. Gregg | 47 | Head | Waitress | Pennsylvania |
| 29 | Mary J. Gregg | 15 | Daughter | — | Pennsylvania |
| 30 | Harry Bennett | 41 | Lodger | Mechanic | Pennsylvania |
| 31 | Joseph C. Colgan | 70 | Head | Clerk | Pennsylvania |
| 32 | John L. Gorman | 48 | Boarder | Constable | Pennsylvania |
| 33 | Catherine Gorman | 33 | Boarder | — | Pennsylvania |
| 34 | Daniel Gorman | 42 | Lodger | Salesman | Pennsylvania |
| 35 | Timothy J. Keohane | 67 | Head | Clerk | Pennsylvania |
| 36 | Dennis F. Keohane | 54 | Brother | Banker | Pennsylvania |
| 37 | Mary A. Keohane | 64 | Sister | — | Pennsylvania |
| 38 | Margaret Driscoll | 55 | Head | — | Irish Free State |
| 39 | Catherine Driscoll | 27 | Daughter | Stenographer | Pennsylvania |
| 40 | John J. Driscoll | 22 | Son | Clerk | Pennsylvania |
| 41 | Daniel F. Driscoll | 19 | Son | Technician | Pennsylvania |
| 42 | Michael J. Driscoll | 17 | Son | — | Pennsylvania |
| 43 | Robert Mcgeary | 28 | Head | Auto Master | New Jersey |
| 44 | Margaret Mcgeary | 28 | Wife | — | Pennsylvania |
| 45 | Robert Mcgeary | 5 | Son | — | Pennsylvania |
| 46 | Marjorie Mcgeary | 1 | Daughter | — | Pennsylvania |
| 47 | John J. Fitzpatrick | 60 | Lodger | Laborer | Pennsylvania |
| 48 | — | None | — | — | — |
| 49 | — | None | — | — | — |
| 50 | — | None | — | — | — |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)