MC
Mary Cavanaugh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Cavanaugh across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Female
Daughter
Born: Northern Ireland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Cavanaugh |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Northern Ireland |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Parlor Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 1 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birthplace (normalized) | northern ireland |
| Occupation | Parlor Maid |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| C Cavanaugh | Daughter | — | 16 | ~1924 |
| Teresa Cavanaugh | Daughter | — | 6 | ~1934 |
| Mary Cavanaugh | Daughter | — | 19 | ~1921 |
| Elizabeth Cavanaugh | Daughter | — | 17 | ~1923 |
| Thomas Cavanaugh | Son | — | 1 | ~1939 |
| Thomas Cavanaugh | Head | — | 40 | ~1900 |
| Ellen Cavanaugh | Daughter | — | 4 | ~1936 |
| Bridget Cavanaugh | Spouse | — | 38 | ~1902 |
| Daniel Cavanaugh | Son | — | 3 | ~1937 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 9
Philadelphia, Pennsylvania · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cavanaugh |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Northern Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1929 |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | northern ireland |
1940
Philadelphia-County, Pennsylvania
Daughter, age 19
Philadelphia-County, Pennsylvania · implied b. ~1921 — 9 household members
| Surname | Cavanaugh |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Northern Ireland |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Naturalized |
| Occupation | Parlor Maid |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 1 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birthplace (normalized) | northern ireland |
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 Cavanaugh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cavanaugh
Daughter · 1940 · age 19 · b. ~1921 · Pennsylvania
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Sibling
C Cavanaugh
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Cavanaugh
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Cavanaugh
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Cavanaugh
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Cavanaugh
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Teresa Cavanaugh
Sibling · 1940 · age 6
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03724-01112)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Cecelia Sullivan | 6 | Daughter | — | New Jersey |
| 2 | Julia A. Sullivan | 4 | Daughter | — | New Jersey |
| 3 | Jeanne R. Sullivan | 1 | Daughter | — | New Jersey |
| 4 | James Billow | 45 | Head | Roofer | Penna. |
| 5 | Jennie Billow | 48 | Wife | Elevator Operator | Penna. |
| 6 | William J. Billow | 19 | Son | — | Penna. |
| 7 | James Robert Billow | 17 | Son | — | Penna. |
| 8 | Thomas Cavanaugh | 40 | Head | Assistant Sexton | Northern Ireland |
| 9 | Bridget Cavanaugh | 38 | Wife | — | Northern Ireland |
| 10 | Mary Cavanaugh THIS PERSON | 19 | Daughter | Parlor Maid | Northern Ireland |
| 11 | Elizabeth Cavanaugh | 17 | Daughter | — | Northern Ireland |
| 12 | C. Magda Cavanaugh | 16 | Daughter | — | Northern Ireland |
| 13 | Ellen Cavanaugh | 4 | Daughter | — | Penna. |
| 14 | Teresa Cavanaugh | 6 | Daughter | — | Penna. |
| 15 | Daniel J. Cavanaugh | 3 | Son | — | Penna. |
| 16 | Thomas J. Cavanaugh | 1 | Son | — | Penna. |
| 17 | John Ref | 33 | Head | Salesman | Penna. |
| 18 | Marie Ref | 35 | Wife | — | Penna. |
| 19 | Margaret Ref | 10 | Daughter | — | Penna. |
| 20 | Maria G. Todd | 65 | Head | — | Penna. |
| 21 | Mary Ella Todd | 74 | Wife | — | Penna. |
| 22 | Edward Mcmanus | 26 | Head | Salesman | Penna. |
| 23 | Elizabeth Mcmanus | 25 | Wife | — | Penna. |
| 24 | Mary Mcmanus | 2 | Daughter | — | Penna. |
| 25 | Edward Mcmanus | 1 | Son | — | Penna. |
| 26 | — | None | — | — | — |
| 27 | Mary Andrews | 58 | Head | Sewing | Penna. |
| 28 | Florence Smith | 60 | Boarder | Saleswoman | Penna. |
| 29 | James Lynagh | 38 | Boarder | Blacksmith | Irish Free State |
| 30 | John Flood | 45 | Boarder | Dry Cleaner | Irish Free State |
| 31 | Edward R. Finkler | 43 | Head | Supervisor | Penna. |
| 32 | Joseph Mully | 56 | Head | Carpenter | Penna. |
| 33 | Anna Mully | 53 | Wife | — | New Jersey |
| 34 | Mary Mully | 25 | Daughter | Inspector | Penna. |
| 35 | Joseph Mully | 23 | Son | Painting | Penna. |
| 36 | James Mully | 19 | Son | New Worker | Penna. |
| 37 | Anna Mully | 17 | Daughter | New Worker | Penna. |
| 38 | Edward Mully | 16 | Son | — | Penna. |
| 39 | Margaret Mully | 13 | Daughter | — | Penna. |
| 40 | Helen Mully | 11 | Daughter | — | Penna. |
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)