WM
William Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this William Mcdermott across the 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Roselle Boro |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Tree-Walker |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Tree-Walker |
| Township / Ward | Roselle Boro |
| Est. Birth Year | ~1920 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Charles Mcdermott | Head | — | 51 | ~1889 |
| Philip Mcdermott | Son | — | 16 | ~1924 |
| Hazel Mcdermott | Spouse | — | 40 | ~1900 |
| Mary Mcdermott | Daughter | — | 1 | ~1939 |
| William Mcdermott | Son | — | 20 | ~1920 |
| Jerome Mcdermott | Son | — | 11 | ~1929 |
| George Mcdermott | Son | — | 15 | ~1925 |
Census Appearances
1930
Union, New …
Son, age 10
Union, New Jersey · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Son, age 20
Union-County, New Jersey · implied b. ~1920 — 7 household members
| Surname | McDermott |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Roselle Boro |
| 1935 Residence (County) | Union |
| Occupation | Tree-Walker |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 William Mcdermott across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcdermott
Son · 1940 · age 20 · b. ~1920 · New Jersey
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Sibling
George Mcdermott
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Mcdermott
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcdermott
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerome Mcdermott
Sibling · 1940 · age 11
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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02388-00500)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leroy S. Norwood | 50 | Head | Engineer | New Jersey |
| 2 | Marjorie Norwood | 47 | Wife | — | New Jersey |
| 3 | Esther Norwood | 23 | Daughter | — | New Jersey |
| 4 | Marjorie Norwood | 23 | Daughter | Typist | New Jersey |
| 5 | Leroy Norwood | 20 | Son | Clerk | New Jersey |
| 6 | Hazel Norwood | 18 | Daughter | Salesman | New Jersey |
| 7 | Charles Mcdermott | 51 | Head | Watchman | New Jersey |
| 8 | Hazel Mcdermott | 40 | Wife | — | New Jersey |
| 9 | William Mcdermott THIS PERSON | 20 | Son | Tree-Walker | New Jersey |
| 10 | Philip Mcdermott | 16 | Son | Tree-Walker | New Jersey |
| 11 | George Mcdermott | 15 | Son | — | New Jersey |
| 12 | Jerome Mcdermott | 11 | Son | — | New Jersey |
| 13 | Mary Mcdermott | 1 | Daughter | — | New Jersey |
| 14 | Joseph Davey | 59 | Head | Stillman Helper | Pennsylvania |
| 15 | Independence Davey | 61 | Wife | — | Missouri |
| 16 | William Davey | 30 | Son | Time Keeper | Pennsylvania |
| 17 | Joseph Davey | 28 | Son | Machine Hand | Pennsylvania |
| 18 | Paul Davey | 24 | Son | Lineman | Pennsylvania |
| 19 | Thomas Davey | 19 | Son | New Worker | New Jersey |
| 20 | Ruth Davey | 16 | Daughter | — | New Jersey |
| 21 | Carl A. Gessner | 29 | Head | Accountant | New Jersey |
| 22 | Isabel Gessner | 24 | Wife | — | New Jersey |
| 23 | Linda Gessner | 1 | Daughter | — | New Jersey |
| 24 | Leonard Twist | 29 | Head | Superintendent | Minnesota |
| 25 | Helen Twist | 26 | Wife | — | Minnesota |
| 26 | Roger Twist | 3 | Son | — | New Jersey |
| 27 | Lloyd Helmhold | 27 | Lodger | Foreman | Minnesota |
| 28 | Millard P. Anderson | 28 | Head | Supervisor | New Jersey |
| 29 | Helen Anderson | 25 | Wife | — | New Jersey |
| 30 | Millard Anderson | 3 | Son | — | New Jersey |
| 31 | Charles Beyer | 28 | Head | Chauffeur | New Jersey |
| 32 | Anniela Beyer | 28 | Wife | — | New Jersey |
| 33 | Joseph F. Major | 35 | Head | Mechanical Foreman | New York |
| 34 | Helen Major | 36 | Wife | — | New Jersey |
| 35 | Jo-Ann Major | 2 | Daughter | — | New Jersey |
| 36 | Justus Rossbach | 37 | Head | Musician | New York |
| 37 | Carl Rossbach | 32 | Brother | Manager | New York |
| 38 | Pauline Wintermantel | 58 | Mother | — | New York |
| 39 | — | None | — | — | — |
| 40 | Frederick H. Kamoril | 55 | Head | Telegrapher | New York |
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)