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James Costello — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this James Costello across the 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1900), then head of a 7-person household.
Age 40
b. ~1900
Male
Son
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Costello |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | W. Conshohocken |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Auto Car Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Truck Driver |
| Township / Ward | W Conshohocken |
| Est. Birth Year | ~1900 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Joseph Costello | Head | — | 68 | ~1872 |
| Martha Costello | Daughter | — | 34 | ~1906 |
| Catherine Costello | Daughter | — | 43 | ~1897 |
| Frances Costello | Daughter | — | 24 | ~1916 |
| James Costello | Son | — | 40 | ~1900 |
| Regina Costello | Daughter | — | 32 | ~1908 |
| Elizabeth Costello | Spouse | — | 64 | ~1876 |
Census Appearances
1930
Philadelphia, Pennsylvania
Other, age 29
Philadelphia, Pennsylvania · implied b. ~1901 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | James |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Penna |
| Age at First Marriage | 24 |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Time Keeper |
| Industry | Builder |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Montgomery-County, Pennsylvania
Son, age 40
Montgomery-County, Pennsylvania · implied b. ~1900 — 7 household members
| Surname | Costello |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | W. Conshohocken |
| 1935 Residence (County) | Montgomery |
| Occupation | Truck Driver |
| Industry | Auto Car Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 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 40 · b. ~1900 · Pennsylvania
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Sibling
Martha Costello
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Costello
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Costello
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Costello
Sibling · 1940 · age 43
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03586-00038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Bolen | 27 | Head | Clerk | Penna |
| 2 | Irene Bolen | 27 | Wife | — | Penna |
| 3 | Mabel Bolen | 5 | Daughter | — | Penna |
| 4 | Monroe Lowers | 51 | Head | Helper | Penna |
| 5 | Anna Lowers | 47 | Wife | — | Penna |
| 6 | Ernest Lowers | 24 | Son | New Worker | Penna |
| 7 | Elwood Lowers | 20 | Son | New Worker | Penna |
| 8 | John Lowers | 16 | Son | — | Penna |
| 9 | Monroe Lowers | 14 | Son | — | Penna |
| 10 | Betty Lowers | 12 | Daughter | — | Penna |
| 11 | Anthony Postella | 33 | Head | Punch Weaver | Penna |
| 12 | Annabelle Postella | 30 | Wife | — | Penna |
| 13 | Pearl Postella | 5 | Daughter | — | Penna |
| 14 | Amanda Mitchell | 65 | Mother-in-law | — | Penna |
| 15 | Mahlon Lowers | 53 | Head | Heater | Penna |
| 16 | Ada Lowers | 49 | Wife | — | Penna |
| 17 | Helen Lowers | 20 | Daughter | — | Penna |
| 18 | Zayna Lowers | 17 | Daughter | — | Penna |
| 19 | John Lowers | 51 | Head | Watchman | Penna |
| 20 | Julia Lowers | 49 | Wife | — | Penna |
| 21 | Mary Lowers | 20 | Daughter | — | Penna |
| 22 | Julia Lowers | 26 | Daughter | — | Penna |
| 23 | George Hannum | 69 | Head | — | Penna |
| 24 | Martha Hannum | 71 | Sister | — | Penna |
| 25 | William Graham | 62 | Lodger | Painter | Penna |
| 26 | Joseph Costello | 68 | Head | — | Penna |
| 27 | Elizabeth Costello | 64 | Wife | — | Penna |
| 28 | Catherine Costello | 43 | Daughter | Machine Operator | Penna |
| 29 | James Costello THIS PERSON | 40 | Son | Truck Driver | Penna |
| 30 | Martha Costello | 34 | Daughter | Machine Operator | Penna |
| 31 | Regina Costello | 32 | Daughter | — | Penna |
| 32 | Frances Costello | 24 | Daughter | Copyist Clerk | Penna |
| 33 | Harry Beaver | 69 | Head | Sprayer | Penna |
| 34 | Emma Beaver | 52 | Wife | — | Penna |
| 35 | Agnes Hayes | 23 | Daughter | Trimmer | Penna |
| 36 | Mary Beaver | 18 | Daughter | — | Penna |
| 37 | Michael Hayes | 51 | Head | Machine Worker | Penna |
| 38 | Mary Hayes | 50 | Wife | — | Penna |
| 39 | Mary Hayes | 20 | Daughter | — | Penna |
| 40 | Ralph Bernardo | 39 | Head | Plush Weaver | 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)