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John Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Westchester-County, New York
Our Model Tree links this John Mcdermott across the 1920, 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 10-person household.
Age 55
b. ~1885
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Westchester-County, New York |
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Dobbs Ferry |
| 1935 Residence (County) | Westchester |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Manager |
| Industry | Retail Grocery |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 5500 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Manager |
| Township / Ward | Dobbs Ferry |
| Est. Birth Year | ~1885 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rosemary Mcdermott | Daughter | — | 12 | ~1928 |
| Julia Mcdermott | Daughter | — | 10 | ~1930 |
| John Mcdermott | Head | — | 55 | ~1885 |
| Joseph Mcdermott | Son | — | 20 | ~1920 |
| John Mcdermott | Son | — | 24 | ~1916 |
| James Mcdermott | Son | — | 16 | ~1924 |
| Lawrence Mcdermott | Son | — | 7 | ~1933 |
| Thomas Mcdermott | Son | — | 18 | ~1922 |
| William Mcdermott | Son | — | 22 | ~1918 |
| Rosa Mcdermott | Spouse | — | 51 | ~1889 |
Census Appearances
1920
New York, …
Head, age 36
New York, New York · implied b. ~1884
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1914 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Houseman |
| Industry | Hotel |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
New York, …
Head, age 46
New York, New York · implied b. ~1884
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Ireland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1907 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Longshoreman |
| Industry | Docks |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 11 |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Westchester-County, New …
Head, age 55
Westchester-County, New York · implied b. ~1885 — 10 household members
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Dobbs Ferry |
| 1935 Residence (County) | Westchester |
| Naturalization Status | Naturalized |
| Occupation | Manager |
| Industry | Retail Grocery |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 5500 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mcdermott
Head · 1940 · age 55 · b. ~1885 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Westchester-County, New York
Open full size
1940 US Federal Census — Westchester-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02803-00564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Mcdermott THIS PERSON | 55 | Head | Manager | Ireland |
| 2 | Rosa Mcdermott | 51 | Wife | — | New York |
| 3 | John Jr. Mcdermott | 24 | Son | Clerk | New York |
| 4 | William Mcdermott | 22 | Son | Shipping Clerk | New York |
| 5 | Joseph Mcdermott | 20 | Son | Clerk | New York |
| 6 | Thomas Mcdermott | 18 | Son | Clerk | New York |
| 7 | James Mcdermott | 16 | Son | — | New York |
| 8 | Rosemary Mcdermott | 12 | Daughter | — | New York |
| 9 | Julia Mcdermott | 10 | Daughter | — | New York |
| 10 | Lawrence Mcdermott | 7 | Son | — | New York |
| 11 | Jacob Israel | 47 | Head | Salesman | New York |
| 12 | Julia Israel | 41 | Wife | Manager | New York |
| 13 | Lucie Kilwee | 37 | Head | Supervisor | New York |
| 14 | Margaret Kilwee | 13 | Daughter | — | New York |
| 15 | Elliott Bray | 49 | Head | Sheet Metal Worker | New York |
| 16 | Martha Bray | 47 | Wife | — | New York |
| 17 | Vincenza De Rosa | 54 | Head | — | Italy |
| 18 | Anna De Rosa | 31 | Daughter | Book Examiner | New York |
| 19 | Thomas De Rosa | 30 | Son | Barber | New York |
| 20 | Charles Yackley | 21 | Lodger | Clerk | Michigan |
| 21 | Louis Reich | 41 | Head | Jeweler | Austria |
| 22 | Mollia Reich | 35 | Wife | — | Austria |
| 23 | Rudolph Ponce | 39 | Head | Proprietor | Germany |
| 24 | Mildred Ponce | 40 | Wife | — | New York |
| 25 | Henry Ponce | 16 | Son | — | New York |
| 26 | Jean Ponce | 11 | Daughter | — | New York |
| 27 | Marie Ponce | 6 | Daughter | — | New York |
| 28 | John De Rosa | 49 | Head | Shoe Maker | Italy |
| 29 | Rachael De Rosa | 38 | Wife | Telephone Operator | New York |
| 30 | Phyllis De Rosa | 17 | Daughter | — | New York |
| 31 | Gayton De Rosa | 15 | Son | — | New York |
| 32 | Ralph Zolan | 40 | Head | Dentist | Russia |
| 33 | Sylvia Zolan | 33 | Wife | — | New York |
| 34 | Marsha Zolan | 10 | Daughter | — | New Jersey |
| 35 | William Zolan | 6 | Son | — | New Jersey |
| 36 | Rosella Zolan | 4 | Daughter | — | New Jersey |
| 37 | Carmelo Ciccnelli | 55 | Head | — | Italy |
| 38 | Marguerita Ciccnelli | 55 | Wife | — | Italy |
| 39 | Constantino Ciccnelli | 12 | Son | — | New York |
| 40 | Dominick Scalera | 55 | Lodger | Laborer | 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)