MS
Mary Shields — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Shields across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1910), then head of a 8-person household.
Age 30
b. ~1910
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Shields |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | PHILADELPHIA |
| Additional Details | |
| Occupation | Electrical Machinery Factory |
| Industry | PW |
| Class of Worker | 860 |
| Highest Grade | Hs 4 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Electrical Machinery Factory |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1910 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Shields | Spouse | — | 50 | ~1890 |
| Thomas Shields | Son | — | 28 | ~1912 |
| Thomas Shields | Head | — | 54 | ~1886 |
| Joseph Shields | Son | — | 19 | ~1921 |
| Veronica Shields | Daughter | — | 23 | ~1917 |
| Harry Shields | Son | — | 21 | ~1919 |
| Mary Shields | Daughter | — | 30 | ~1910 |
| Dolores Shields | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 21
Philadelphia, Pennsylvania · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shield |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 30
Philadelphia-County, Pennsylvania · implied b. ~1910 — 8 household members
| Surname | Shields |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | PHILADELPHIA |
| Occupation | Electrical Machinery Factory |
| Industry | PW |
| Class of Worker | 860 |
| Highest Grade | Hs 4 |
| 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 Shields across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shields
Daughter · 1940 · age 30 · b. ~1910 · Pennsylvania
★ You are viewing this record
Sibling
Dolores Shields
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Shields
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Veronica Shields
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Shields
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Shields
Sibling · 1940 · age 19
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-t0627-03737-00568)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annette Stewart | 0 | Daughter | — | Pennsylvania |
| 2 | Hugh Henry | 53 | Head | Automobile Repair Shop | Pennsylvania |
| 3 | Charlotte Henry | 51 | Wife | 0 | Pennsylvania |
| 4 | Samuel Henry | 27 | Son | Navy Yard | Pennsylvania |
| 5 | Joseph Henry | 27 | Son | Trolley + Bus Factory | Pennsylvania |
| 6 | Frank Schaffhauser | 35 | Head | Trolley + Bus Factory | Pennsylvania |
| 7 | Catherine Schaffhauser | 31 | Wife | 0 | Pennsylvania |
| 8 | Alphonse Schaffhauser | 70 | Father | — | France |
| 9 | Gustave Schrull | 52 | Head | Pw | Germany |
| 10 | Amelia Schrull | 54 | Wife | 0 | Pennsylvania |
| 11 | Joseph Schrull | 22 | Son | Real Estate | Pennsylvania |
| 12 | William Davidson | 40 | Head | Pw | Northern Ireland |
| 13 | Sarah Davidson | 44 | Wife | — | Northern Ireland |
| 14 | Frederick Davidson | 12 | Son | — | Pennsylvania |
| 15 | Ethel Davidson | 9 | Daughter | — | Pennsylvania |
| 16 | Thomas Sr. Shields | 54 | Head | Oil Refinery | Pennsylvania |
| 17 | Mary Shields | 50 | Wife | 0 | Pennsylvania |
| 18 | Mary Shields THIS PERSON | 30 | Daughter | Electrical Machinery Factory | Pennsylvania |
| 19 | Thomas Jr. Shields | 28 | Son | Motor Car Factory | Pennsylvania |
| 20 | Veronica Shields | 23 | Daughter | Electrical Machinery Factory | Pennsylvania |
| 21 | Harry Shields | 21 | Son | 0 | Pennsylvania |
| 22 | Joseph Shields | 19 | Son | Advertising | Pennsylvania |
| 23 | Dolores Shields | 11 | Daughter | — | Pennsylvania |
| 24 | Harold Sams | 40 | Head | Paint Shop | Oregon |
| 25 | Margaret Sams | 37 | Wife | 0 | New Jersey |
| 26 | Raymond Sams | 11 | Son | — | Pennsylvania |
| 27 | Richard Sams | 2 | Son | — | Pennsylvania |
| 28 | George Smith | 36 | Brother-in-law | Oil Refinery | Pennsylvania |
| 29 | Agnes Smith | 29 | Sister-in-law | 0 | Pennsylvania |
| 30 | Dorothy Smith | 11 | Niece | — | Pennsylvania |
| 31 | Evelyn Smith | 8 | Niece | — | Pennsylvania |
| 32 | Caroline Maloney | 55 | Mother-in-law | 0 | Pennsylvania |
| 33 | Joseph Owensby | 51 | Head | Electrical Machinery Factory | North Carolina |
| 34 | Mary Owensby | 45 | Wife | — | Free State |
| 35 | Mary C. Owensby | 25 | Daughter | Electrical Machinery Factory | Pennsylvania |
| 36 | Joseph P. Owensby | 24 | Son | Electrical Machinery Factory | Pennsylvania |
| 37 | William Owensby | 22 | Son | Electrical Machinery Factory | Pennsylvania |
| 38 | Eleanor Owensby | 18 | Daughter | 0 | Pennsylvania |
| 39 | Margaret Owensby | 9 | Daughter | — | Pennsylvania |
| 40 | Nephew Fulton | None | M | Pw | — |
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)