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John Shields — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Shields across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Shields |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Munhall Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Laborer |
| Industry | Armor Plate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Munhall Boro |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Shields | Son | — | 20 | ~1920 |
| Bernard Shields | Head | — | 42 | ~1898 |
| Ernest Shields | Son | — | 18 | ~1922 |
| Robert Shields | Son | — | 13 | ~1927 |
| Mary Hopper | Other | — | 46 | ~1894 |
| Joan Shields | Daughter | — | ~1940 | |
| Elizabeth Hopper | Other | — | 17 | ~1923 |
| Mary Shields | Daughter | — | 16 | ~1924 |
| Marcella Shields | Spouse | — | 40 | ~1900 |
| William Shields | Son | — | 4 | ~1936 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shields |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 20
Allegheny-County, Pennsylvania · implied b. ~1920 — 10 household members
| Surname | Shields |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Munhall Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | Laborer |
| Industry | Armor Plate |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 John Shields across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Shields
Son · 1940 · age 20 · b. ~1920 · Pennsylvania
★ You are viewing this record
Sibling
Mary Shields
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Shields
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Shields
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Shields
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Shields
Sibling · 1940 · age 18
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-t0627-03412-00368)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louisa Shields | 61 | Wife | — | England |
| 2 | Bernard Shields | 42 | Head | Pipefitter | Pennsylvania |
| 3 | Marcella Shields | 40 | Wife | — | Pennsylvania |
| 4 | John Shields THIS PERSON | 20 | Son | Laborer | Pennsylvania |
| 5 | Ernest Jr. Shields | 18 | Son | Chemist | Pennsylvania |
| 6 | Mary Louise Shields | 16 | Daughter | — | Pennsylvania |
| 7 | Robert Shields | 13 | Son | — | Pennsylvania |
| 8 | William Shields | 4 | Son | — | Pennsylvania |
| 9 | Joan Shields | 0 | Daughter | — | Pennsylvania |
| 10 | Mary Hopper | 46 | Sister | — | Pennsylvania |
| 11 | Elizabeth Hopper | 17 | Niece | — | Pennsylvania |
| 12 | Fred H. Evans | 54 | Head | Clerk | Pennsylvania |
| 13 | Hazel G. Evans | 49 | Wife | — | Pennsylvania |
| 14 | Wesley M. Evans | 27 | Son | — | Pennsylvania |
| 15 | Fred H. Jr. Evans | 19 | Son | Clerk | Pennsylvania |
| 16 | Billy Evans | 11 | Son | — | Pennsylvania |
| 17 | Joan Evans | 9 | Daughter | — | Pennsylvania |
| 18 | Fred Vark | 56 | Head | Clerk | Pennsylvania |
| 19 | Mary Vark | 49 | Wife | — | Pennsylvania |
| 20 | Mary Jane Vark | 26 | Daughter | Key Puncher | Pennsylvania |
| 21 | Agnes Vark | 24 | Daughter | Key Puncher | Pennsylvania |
| 22 | Albert Vark | 21 | Son | Machinist Apprentice | Pennsylvania |
| 23 | Fred Jr. Vark | 9 | Son | — | Pennsylvania |
| 24 | Frank J. Guidish | 45 | Head | Electrician Foreman | Pennsylvania |
| 25 | Mary A. Guidish | 35 | Wife | — | Pennsylvania |
| 26 | Mary L. Guidish | 13 | Daughter | — | Pennsylvania |
| 27 | (Blank) Guidish | None | (blank) | — | (blank) |
| 28 | Catherine Topper | 42 | Head | — | Pennsylvania |
| 29 | F. Roy Topper | 23 | Son | Clerk | Pennsylvania |
| 30 | John R. Topper | 22 | Son | Laborer | Pennsylvania |
| 31 | Ellen Topper | 18 | Daughter | New Worker | Pennsylvania |
| 32 | Eileen Topper | 17 | Daughter | — | Pennsylvania |
| 33 | Marie Mills | 34 | Head | Waitress | Pennsylvania |
| 34 | Betty Mills | 15 | Daughter | Clerical | Pennsylvania |
| 35 | Anne Bornek | 71 | Head | — | Hungary |
| 36 | Elizabeth Bornek | 35 | Daughter | Bookkeeper | Pennsylvania |
| 37 | John N. Bornek | 33 | Son | Chief Observer | Pennsylvania |
| 38 | Anne Bornek | 28 | Daughter-in-law | — | Pennsylvania |
| 39 | John P. Bornek | 0 | Grandson | — | Pennsylvania |
| 40 | Andrew V. Tomajko | 21 | Brother | Craneman | 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)