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James Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, New York
Our Model Tree links this James Mcdermott across the 1930 and 1940 US Censuses in Suffolk-County, New York (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 9-person household.
Age 18
b. ~1922
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, New York |
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Lindenhurst Village |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Lindenhurst Village |
| Est. Birth Year | ~1922 |
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 |
|---|---|---|---|---|
| Florence Mcdermott | Daughter | — | 23 | ~1917 |
| Lillian Mcdermott | Daughter | — | 13 | ~1927 |
| Dorothy Mcdermott | Daughter | — | 15 | ~1925 |
| Arthur Mcdermott | Head | — | 50 | ~1890 |
| Chester Mcdermott | Son | — | 21 | ~1919 |
| James Mcdermott | Son | — | 18 | ~1922 |
| William Mcdermott | Son | — | 11 | ~1929 |
| Arthur Mcdermott | Son | — | 25 | ~1915 |
| Florence Mcdermott | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Suffolk, New …
Son, age 8
Suffolk, New York · implied b. ~1922 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Suffolk-County, New …
Son, age 18
Suffolk-County, New York · implied b. ~1922 — 9 household members
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Lindenhurst Village |
| 1935 Residence (County) | Suffolk |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 18 · b. ~1922 · New York
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Sibling
William Mcdermott
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Mcdermott
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Mcdermott
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Chester Mcdermott
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mcdermott
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Mcdermott
Sibling · 1940 · age 23
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 — Suffolk-County, New York
Open full size
1940 US Federal Census — Suffolk-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02783-00389)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward | 34 | son | Button Maker | New York |
| 2 | Julia | 40 | daughter | Button Maker | New York |
| 3 | Mary Ensten | 39 | daughter | Button Maker | New York |
| 4 | Marie Ensten | 15 | grandchild | — | New York |
| 5 | Peter Schneider | 37 | head | Cashier | New York |
| 6 | Charlotte Schneider | 35 | wife | — | New York |
| 7 | Philip Schneider | 61 | head | Proprietor Factory | Pennsylvania |
| 8 | Louise Schneider | 58 | wife | — | New York |
| 9 | Ambrose Schneider | 25 | son | Attendant | New York |
| 10 | Vaclav Vistoil | 79 | head | Press Operator | Bohemia |
| 11 | Mary Vistoil | 73 | wife | — | Bohemia |
| 12 | Otto Goercken | 70 | head | Laborer | Germany |
| 13 | Augusta Goercken | 67 | wife | — | New York |
| 14 | Jonathan Ludford | 42 | son-in-law | Salesman | New Jersey |
| 15 | Elsie Ludford | 43 | daughter | Office Clerk | New York |
| 16 | Ruth Ludford | 21 | granddaughter | Operator | New York |
| 17 | Anna Bertholdt | 49 | lodger | — | Germany |
| 18 | Arthur Mcdermott | 50 | head | Conductor | Illinois |
| 19 | Florence Mcdermott | 50 | wife | — | New York |
| 20 | Arthur Mcdermott | 25 | son | Switchman | New York |
| 21 | Florence Mcdermott | 23 | daughter | Press Hand | New York |
| 22 | Chester Mcdermott | 21 | son | — | New York |
| 23 | James Mcdermott THIS PERSON | 18 | son | — | New York |
| 24 | Dorothy Mcdermott | 15 | daughter | — | New York |
| 25 | Lillian Mcdermott | 13 | daughter | — | New York |
| 26 | William Mcdermott | 11 | son | — | New York |
| 27 | Augusta Lawrence | 60 | head | — | New York |
| 28 | Edith Meyer | 24 | daughter | Attendant | New York |
| 29 | William Meyer | 3 | grandson | — | New York |
| 30 | Walter Warner | 23 | lodger | Laborer | New York |
| 31 | Howard Kelly | 19 | lodger | — | New York |
| 32 | Henry Donke | 57 | head | — | New York |
| 33 | Lena Donke | 57 | wife | — | New York |
| 34 | George Nagengast | 47 | head | Contractor | New York |
| 35 | Mae Nagengast | 42 | wife | — | New York |
| 36 | Blanche Nagengast | 18 | daughter | Houseworker | New York |
| 37 | Wallace Nagengast | 9 | son | — | New York |
| 38 | Frank Thevella | 62 | head | Electrician | New York |
| 39 | Margaret Thevella | 60 | wife | — | New York |
| 40 | Andrew Thevella | 27 | son | Radio Installer | 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)