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John Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Monmouth-County, New Jersey
Our Model Tree links this John Mcdermott across the 1930 and 1940 US Censuses in Monmouth-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 12-person household.
Age 19
b. ~1921
Male
Son
Born: Georgia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Monmouth-County, New Jersey |
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Belford |
| 1935 Residence (County) | Monmouth |
| Additional Details | |
| Industry | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Township / Ward | Belford |
| 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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Louis Mcdermott | Daughter | — | 7 | ~1933 |
| Alma Mcdermott | Daughter | — | 17 | ~1923 |
| Bernice Mcdermott | Daughter | — | 10 | ~1930 |
| Mary Mcdermott | Daughter | — | 12 | ~1928 |
| Catherine Mcdermott | Daughter | — | 3 | ~1937 |
| John Mcdermott | Head | — | 40 | ~1900 |
| Robert Mcdermott | Son | — | 14 | ~1926 |
| Raymond Mcdermott | Son | — | 6 | ~1934 |
| John Mcdermott | Son | — | 19 | ~1921 |
| Francis Mcdermott | Son | — | 15 | ~1925 |
| Joseph Mcdermott | Son | — | 1 | ~1939 |
| Alma Mcdermott | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Monmouth, New …
Son, age 7
Monmouth, New Jersey · implied b. ~1923 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Georgia |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Monmouth-County, New …
Son, age 19
Monmouth-County, New Jersey · implied b. ~1921 — 12 household members
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Belford |
| 1935 Residence (County) | Monmouth |
| Industry | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 Mcdermott across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcdermott
Son · 1940 · age 19 · b. ~1921 · New Jersey
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Sibling
Catherine Mcdermott
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Mcdermott
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Mcdermott
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcdermott
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcdermott
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcdermott
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Mcdermott
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcdermott
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alma Mcdermott
Sibling · 1940 · age 17
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 — Monmouth-County, New Jersey
Open full size
1940 US Federal Census — Monmouth-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02368-00256)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith Johnson | 9 | Daughter | — | New Jersey |
| 2 | John Johnson | 5 | Son | — | New Jersey |
| 3 | William Monell | 75 | Head | Fisherman | New Jersey |
| 4 | Sarah Monell | 70 | Wife | Housewife | New Jersey |
| 5 | William Monell | 40 | Son | Plumber | New Jersey |
| 6 | John Mcdermott | 40 | Head | Investigator | New Jersey |
| 7 | Alma Mcdermott | 38 | Wife | Housewife | New Jersey |
| 8 | John Mcdermott THIS PERSON | 19 | Son | — | Georgia |
| 9 | Alma Mcdermott | 17 | Daughter | — | New Jersey |
| 10 | Francis Mcdermott | 15 | Son | — | New Jersey |
| 11 | Robert Mcdermott | 14 | Son | — | New Jersey |
| 12 | Mary Mcdermott | 12 | Daughter | — | New Jersey |
| 13 | Bernice Mcdermott | 10 | Daughter | — | New Jersey |
| 14 | Louis Mcdermott | 7 | Daughter | — | New Jersey |
| 15 | Raymond Mcdermott | 6 | Son | — | New Jersey |
| 16 | Catherine Mcdermott | 3 | Daughter | — | New Jersey |
| 17 | Joseph Mcdermott | 1 | Son | — | New Jersey |
| 18 | Thomas Merivni | Merivine | 56 | Head | Polisher | New Jersey |
| 19 | Caroline Merivni | Merivine | 51 | Wife | Housewife | New Jersey |
| 20 | Josephine Merivni | Merivine | 23 | Daughter | — | New Jersey |
| 21 | Francis Merivni | Merivine | 23 | Daughter | — | New Jersey |
| 22 | John Brodmann | 48 | Head | Jag Mender | Tag Mender | New York |
| 23 | Sophie Brodmann | 52 | Wife | Housewife | New Jersey |
| 24 | John Brodmann | 29 | Son | — | New Jersey |
| 25 | Irving Hesse | 29 | Head | Truck Driver | New Jersey |
| 26 | Nellie Hesse | 26 | Wife | Housewife | New Jersey |
| 27 | Jean Hesse | 9 | Daughter | — | New Jersey |
| 28 | Margaret Hesse | 6 | Daughter | — | New Jersey |
| 29 | Irving Hesse | 2 | Son | — | New Jersey |
| 30 | Daniel Hesse | 0 | Son | — | New Jersey |
| 31 | Catherine Roop | 79 | Head | Housewife | New Jersey |
| 32 | Ethel Roop | 44 | Daughter | Housewife | New Jersey |
| 33 | Albert Ranger | 32 | Head | Pumpman | New York |
| 34 | Evelyn Ranger | 29 | Wife | Housewife | New Jersey |
| 35 | Albert Oswald | 37 | Head | Fisherman | New Jersey |
| 36 | Anna Oswald | 36 | Wife | Housewife | Poland |
| 37 | Marie Oswald | 6 | Daughter | — | New Jersey |
| 38 | Albert Oswald | 4 | Son | — | New Jersey |
| 39 | Vincent Walling | 28 | Head | Newspaper | New Jersey |
| 40 | Zelda Walling | 25 | Wife | Housewife | New Jersey |
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)