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James Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this James Mcdermott across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Catherine O'Callaghan | Daughter | — | 26 | ~1914 |
| Rita Mcdermott | Daughter | — | 13 | ~1927 |
| Phyllis Mcdermott | Daughter | — | 11 | ~1929 |
| Thomas Mcdermott | Head | — | 53 | ~1887 |
| William O'Callaghan | Other | — | 29 | ~1911 |
| James Mcdermott | Son | — | 14 | ~1926 |
| Joseph Mcdermott | Son | — | 7 | ~1933 |
| John Mcdermott | Son | — | 16 | ~1924 |
| Catherine Mcdermott | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Philadelphia, Pennsylvania
Son, age 4
Philadelphia, Pennsylvania · implied b. ~1926 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Son, age 14
Philadelphia-County, Pennsylvania · implied b. ~1926 — 9 household members
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 James Mcdermott across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mcdermott
Son · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
John Mcdermott
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Mcdermott
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcdermott
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Mcdermott
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine O'Callaghan
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-t0627-03704-00685)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ira P. Groselle | 57 | Head | Manager | Greece |
| 2 | Alfred Kulenberger | 28 | Employee | Cook | Germany |
| 3 | James Hill | 57 | Employee | Hall Man | Pennsylvania |
| 4 | Frank Adcock | 52 | Employee | Watch Man | England |
| 5 | Joe Yamashiro | 52 | Head | Cook | Japan |
| 6 | Judge E. Morgan | 66 | Lodger | — | Virginia |
| 7 | Martin Murphy | 36 | Employee | House Man | Ireland |
| 8 | George Purviance | 61 | Lodger | Ders. Chemist | Ohio |
| 9 | Andrew M. Jamison | 27 | Lodger | — | California |
| 10 | Thomas R. Greel | 45 | Lodger | Broker | Pennsylvania |
| 11 | Thomas Mcdermott | 53 | Head | Landscape Gardner | Ireland |
| 12 | Catherine Mcdermott | 50 | Wife | — | Ireland |
| 13 | John Mcdermott | 16 | Son | — | Pennsylvania |
| 14 | James Mcdermott THIS PERSON | 14 | Son | — | Pennsylvania |
| 15 | Rita P. Mcdermott | 13 | Daughter | — | Pennsylvania |
| 16 | Phyllis A. Mcdermott | 11 | Daughter | — | Pennsylvania |
| 17 | Catherine O'Callaghan | 26 | Daughter | Part Assembler | Pennsylvania |
| 18 | William O'Callaghan | 29 | Son-in-law | Telephone Adjuster | Pennsylvania |
| 19 | Joseph Mcdermott | 7 | Son | — | Pennsylvania |
| 20 | Frederick Sbroglia | 67 | Head | Build | Italy |
| 21 | Valeria Ceccarelli | 39 | Daughter | — | Italy |
| 22 | Gracinto Ceccarelli | 44 | Son-in-law | — | Italy |
| 23 | Lillian Ceccarelli | 19 | Granddaughter | — | Pennsylvania |
| 24 | Robert A. Ceccarelli | 17 | Grandson | — | Pennsylvania |
| 25 | Viola Sbroglia | 29 | Daughter | Technician | Pennsylvania |
| 26 | John Fisher | 36 | Head | Advertiser | Pennsylvania |
| 27 | Mary Fisher | 30 | Wife | — | Pennsylvania |
| 28 | Jane Fisher | 0 | Daughter | — | Pennsylvania |
| 29 | Alceo Sbroglia | 34 | Head | — | Luxembourg |
| 30 | Margaret Sbroglia | 34 | Wife | — | Pennsylvania |
| 31 | Maude B. Humphrey | 54 | Head | Research Work | Pennsylvania |
| 32 | — | None | — | — | — |
| 33 | Francis Wolfe | 39 | Head | Surgeon | Iowa |
| 34 | Marie Wolfe | 36 | Wife | — | Illinois |
| 35 | Francis Jr. Wolfe | 7 | Son | — | Missouri |
| 36 | Richard Wolfe | 6 | Son | — | Missouri |
| 37 | Charlotte Brooke | 56 | Lodger | Clerk | Pennsylvania |
| 38 | James M. Rogers | 68 | Head | Merchant | Pennsylvania |
| 39 | George Rogers | 64 | Brother | Doctor | Pennsylvania |
| 40 | Janet | 60 | Sister | — | 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)