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James Costello — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this James Costello across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Male
Son
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Costello |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Phila City |
| 1935 Residence (County) | Phila |
| Additional Details | |
| Occupation | Apprentice Machinist |
| Industry | Saw Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Apprentice Machinist |
| Township / Ward | Phila City |
| 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 James | Age | Birth yr |
|---|---|---|---|---|
| Thomas Costello | Son | — | 11 | ~1929 |
| Joseph Costello | Son | — | 16 | ~1924 |
| John Costello | Son | — | 26 | ~1914 |
| Albert Costello | Son | — | 6 | ~1934 |
| Ella Costello | Spouse | — | 47 | ~1893 |
| Mary Costello | Daughter | — | 24 | ~1916 |
| Frank Costello | Son | — | 23 | ~1917 |
| John Costello | Head | — | 47 | ~1893 |
| James Costello | Son | — | 19 | ~1921 |
Census Appearances
1930
Philadelphia, Pennsylvania
Other, age 9
Philadelphia, Pennsylvania · implied b. ~1921 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | James Edward |
| Relationship to Head | Inmate |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Penna. |
| Father's Birthplace | Rhode Island |
| Mother's Birthplace | Penna. |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Son, age 19
Philadelphia-County, Pennsylvania · implied b. ~1921 — 9 household members
| Surname | Costello |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Phila City |
| 1935 Residence (County) | Phila |
| Occupation | Apprentice Machinist |
| Industry | Saw Mfg Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 700 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 James Costello across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Costello
Son · 1940 · age 19 · b. ~1921 · Pennsylvania
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Sibling
Thomas Costello
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Costello
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Costello
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Costello
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Costello
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Costello
Sibling · 1940 · age 26
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-t0627-03739-00060)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Robinson | 28 | Head | House | Penna |
| 2 | Annie Brown | 78 | Lodger | — | Penna |
| 3 | John J. Jr. Lavery | 26 | Head | Meat Cutter | Penna |
| 4 | Georgia Lavery | 21 | Wife | Clerk | Panama |
| 5 | William Lavery | 20 | Brother | Order Clerk | Penna |
| 6 | William Holden | 31 | Son in law | Teller | Penna |
| 7 | Myrtle Holden | 30 | Sister | Bookkeeper | Penna |
| 8 | Bernard E. Junod | 57 | Head | Brakeman | Penna |
| 9 | Justina Junod | 54 | Wife | — | France |
| 10 | Charles Junod | 23 | Son | Shipper | Penna |
| 11 | Anna Junod | 21 | Daughter | Inspectress | Penna |
| 12 | Bernard E. Junod | 16 | Son | — | Penna |
| 13 | Joseph Junod | 13 | Son | — | Penna |
| 14 | Howard T. Mills | 71 | Head | Sharpener | New Jersey |
| 15 | Blanche M. Mills | 57 | Wife | — | Penna |
| 16 | Myrtle T. Mills | 21 | Daughter | Secretary | Penna |
| 17 | Ephraim C. Mills | 46 | Son | Finisher | Penna |
| 18 | Charles R. Myers | 62 | Head | Grinder | Penna |
| 19 | Charles F. Myers | 29 | Son | Accountant | Penna |
| 20 | Dorothy Myers | 22 | In law | Bookkeeper | Penna |
| 21 | Frank E. Costello | 43 | Head | Machinist | Penna |
| 22 | Mary E. Costello | 41 | Wife | — | Penna |
| 23 | Mary E. Costello | 20 | Daughter | Bookkeeper | Penna |
| 24 | Owen T. Costello | 18 | Son | Checker | Penna |
| 25 | Frances E. Costello | 16 | Son | — | Penna |
| 26 | Mary Costello | 72 | Cousin | — | Penna |
| 27 | John Costello | 47 | Head | Machinist | Penna |
| 28 | Ella Costello | 47 | Wife | — | Penna |
| 29 | John Costello | 26 | Son | Machine Saw Filer | Penna |
| 30 | Mary Lou Costello | 24 | Daughter | Inspectress | Penna |
| 31 | Frank Costello | 23 | Son | Machine Operator | Penna |
| 32 | James Costello THIS PERSON | 19 | Son | Apprentice Machinist | Penna |
| 33 | Joseph Costello | 16 | Son | — | Penna |
| 34 | Thomas Costello | 11 | Son | — | Penna |
| 35 | Albert Costello | 6 | Son | — | Penna |
| 36 | John Mason | 41 | Head | Patrolman | Penna |
| 37 | Katherine Mason | 34 | Wife | — | Penna |
| 38 | Elizabeth Mason | 12 | Daughter | — | Penna |
| 39 | John Jr. Mason | 6 | Son | — | Penna |
| 40 | Joseph Curcuruto | 45 | Head | Fireman | Italy |
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)