MW
Mary Watson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Watson across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | WATSON |
| Given Name | MARY |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Isabella Watson | Daughter | — | 3 | ~1937 |
| Mary Watson | Daughter | — | 12 | ~1928 |
| Harry Watson | Head | — | 44 | ~1896 |
| Thomas Watson | Son | — | 7 | ~1933 |
| John Watson | Son | — | 10 | ~1930 |
| Joseph Watson | Son | — | 17 | ~1923 |
| James Watson | Son | — | 9 | ~1931 |
| Francis Watson | Son | — | 19 | ~1921 |
| Herbert Watson | Son | — | 14 | ~1926 |
| Catharine Watson | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 2
Philadelphia, Pennsylvania · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Watson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 12
Philadelphia-County, Pennsylvania · implied b. ~1928 — 10 household members
| Surname | WATSON |
| Given Name | MARY |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | No 5 |
| 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 Watson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Watson
Daughter · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Joseph Watson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Watson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Watson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabella Watson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Watson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Watson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herbert Watson
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 — 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-t0627-03732-00301)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Park | 51 | Head | Huckster | Pennsylvania |
| 2 | Anna Park | 51 | Wife | — | Pennsylvania |
| 3 | Joseph Park | 26 | Son | Huckster | Pennsylvania |
| 4 | Dorothy Park | 22 | Daughter | Stenographer | Pennsylvania |
| 5 | Helen Park | 19 | Daughter | Stenographer | Pennsylvania |
| 6 | Alene Park | 15 | Daughter | — | Pennsylvania |
| 7 | Patrick Mcdaniel | 71 | Head | Janitor | Scotland |
| 8 | Catherine Mcdaniel | 71 | Wife | — | Eire |
| 9 | Loretta Mcdaniel | 41 | Daughter | Bookkeeper | Pennsylvania |
| 10 | Regina Mcdaniel | 30 | Daughter | — | Pennsylvania |
| 11 | Bella Mawhinney | 55 | Head | — | N. Ireland |
| 12 | Sally Mawhinney | 29 | Daughter | Stenographer | Pennsylvania |
| 13 | Thomas Mawhinney | 23 | Son | Machinist | Pennsylvania |
| 14 | Rose Mawhinney | 25 | Daughter | House Work | Pennsylvania |
| 15 | Harry Watson | 44 | HEAD | Store Keeper | Pennsylvania |
| 16 | Catharine Watson | 43 | WIFE | — | Pennsylvania |
| 17 | Francis Watson | 19 | SON | Attendant | Pennsylvania |
| 18 | Joseph Watson | 17 | SON | New Worker | Pennsylvania |
| 19 | Herbert Watson | 14 | SON | — | Pennsylvania |
| 20 | Mary Watson THIS PERSON | 12 | Daughter | — | Pennsylvania |
| 21 | John Watson | 10 | Son | — | Pennsylvania |
| 22 | James Watson | 9 | Son | — | Pennsylvania |
| 23 | Thomas Watson | 7 | Son | — | Pennsylvania |
| 24 | Isabella Watson | 3 | Daughter | — | Pennsylvania |
| 25 | William Calhoun | 41 | Head | Clerk | Pennsylvania |
| 26 | Mildred Calhoun | 27 | Wife | — | Pennsylvania |
| 27 | William Calhoun | 5 | Son | — | Pennsylvania |
| 28 | Barbara Calhoun | 2 | Daughter | — | Pennsylvania |
| 29 | Louis Calderazzo | 46 | Head | Foreman | Italy |
| 30 | Philomena Calderazzo | 33 | Wife | — | Pennsylvania |
| 31 | Marian Calderazzo | 15 | Daughter | — | Maryland |
| 32 | Nancy Calderazzo | 14 | Daughter | — | Maryland |
| 33 | Joseph Calderazzo | 12 | Son | — | Pennsylvania |
| 34 | Arline Calderazzo | 11 | Daughter | — | Pennsylvania |
| 35 | Martin Mularney | 31 | Head | Hardener | Pennsylvania |
| 36 | Mary Mularney | 27 | Wife | Inspector | Pennsylvania |
| 37 | Joseph Sepan | 43 | Head | Shipper | Italy |
| 38 | Mary Sepan | 33 | Wife | — | Italy |
| 39 | Josephine Sepan | 17 | Daughter | New Worker | Pennsylvania |
| 40 | Julia Sepan | 16 | Daughter | — | Pennsylvania |
Related Census Records
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)