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John Costello — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Costello across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1896), then head of a 10-person household.
Age 44
b. ~1896
Male
Head
Born: Newfoundland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Costello |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Rigger |
| Industry | Auto Rep |
| Class of Worker | PW |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Penna |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
| Occupation | Rigger |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1896 |
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 |
|---|---|---|---|---|
| Gertrude Costello | Daughter | — | 11 | ~1929 |
| Barbara Costello | Daughter | — | 1 | ~1939 |
| Anna Costello | Daughter | — | 14 | ~1926 |
| Gertrude Costello | Spouse | — | 44 | ~1896 |
| John Costello | Head | — | 44 | ~1896 |
| Evangeline Costello | Daughter | — | 13 | ~1927 |
| Elizabeth Costello | Daughter | — | 15 | ~1925 |
| Ellenor Costello | Daughter | — | 6 | ~1934 |
| Margaret Costello | Daughter | — | 8 | ~1932 |
| Marion Costello | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Philadelphia, Pennsylvania
Head, age 38
Philadelphia, Pennsylvania · implied b. ~1892 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 23 |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Occupation | Iron Worker |
| Industry | Iron Foundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
1940
Philadelphia-County, Pennsylvania
Head, age 44
Philadelphia-County, Pennsylvania · implied b. ~1896 — 10 household members
| Surname | Costello |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Occupation | Rigger |
| Industry | Auto Rep |
| Class of Worker | PW |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Penna |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
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 Costello across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Costello
Head · 1940 · age 44 · b. ~1896 · Pennsylvania
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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-t0627-03709-00564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Adela Carp | 10 | Daughter | — | Penna |
| 2 | Mary M Carp | 3 | Daughter | — | — |
| 3 | Alice Hertz | 70 | Head | H S | Penna |
| 4 | Ellen Hertz | 48 | Daughter | Operator | Penna |
| 5 | Nicholas Russin | 61 | Head | R | Austria |
| 6 | Mary Russin | 28 | Daughter | Saleslady | New York |
| 7 | Nicholas Russin | 25 | Son | 65 | New York |
| 8 | Catherine Russin | 18 | Daughter | H S | Penna |
| 9 | James Mulvenna | 41 | Head | Repairman | Penna |
| 10 | Margaret Mulvenna | 44 | Wife | H S | Penna |
| 11 | John Mulvenna | 8 | Son | — | Penna |
| 12 | James Jr Mulvenna | 5 | Son | — | — |
| 13 | Dennis Sheridan | 68 | Head | Tailor | Penna |
| 14 | Patrick Sheridan | 60 | Brother | H S | Penna |
| 15 | Herbert Klang | 30 | Head | Mech. | Penna |
| 16 | Catherine Klang | 23 | Wife | H S | Penna |
| 17 | Otto Squires | 32 | Head | Sprayer | Penna |
| 18 | Marie Squires | 27 | Wife | H S | Penna |
| 19 | John Squires | 11 | Son | — | Penna |
| 20 | Dorothy Squires | 11 | Daughter | — | Penna |
| 21 | John Squires | 30 | Brother | Labor | Penna |
| 22 | Albert Swallow | 25 | Head | Driver | Penna |
| 23 | Catherine Swallow | 31 | Wife | H S | Penna |
| 24 | Albert Jr Swallow | 7 | Son | — | Penna |
| 25 | Robert Swallow | 5 | Son | — | — |
| 26 | Richard Swallow | 3 | Son | — | — |
| 27 | Thomas Swallow | 1 | Son | — | — |
| 28 | John Costello THIS PERSON | 44 | Head | Rigger | Newfoundland |
| 29 | Gertrude Costello | 44 | Wife | H S | Newfoundland |
| 30 | Elizabeth Costello | 15 | Daughter | — | Penna |
| 31 | Anna Costello | 14 | Daughter | — | Penna |
| 32 | Evangeline Costello | 13 | Daughter | — | Penna |
| 33 | Gertrude M Costello | 11 | Daughter | — | Penna |
| 34 | Marion Costello | 10 | Daughter | — | Penna |
| 35 | Margaret Costello | 8 | Daughter | — | Penna |
| 36 | Ellenor Costello | 6 | Daughter | — | Penna |
| 37 | Barbara Costello | 1 | Daughter | — | — |
| 38 | Ervin Eichroth | 41 | Head | Pipefitter | Penna |
| 39 | Caroline Eichroth | 38 | Wife | H S | Penna |
| 40 | Ruth Eichroth | 19 | Daughter | Cutter | 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)