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Mary Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bronx-County, New York
Our Model Tree links this Mary Mcdermott across the 1910, 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 5-person household.
Age 52
b. ~1888
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Bronx-County, New York |
| Surname | McDermott |
| Given Name | Mary J. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Bronx |
| Naturalization Status | Naturalized |
| Additional Details | |
| Industry | 0 |
| Highest Grade | G 4 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York |
| Est. Birth Year | ~1888 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Catherine Mcdermott | Daughter | — | 28 | ~1912 |
| Peter Mcdermott | Head | — | 60 | ~1880 |
| Edward Mcdermott | Son | — | 23 | ~1917 |
| John Mcdermott | Son | — | 26 | ~1914 |
| Mary Mcdermott | Spouse | — | 52 | ~1888 |
Census Appearances
1910
New York, …
Other, age 21
New York, New York · implied b. ~1889 — 29 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Margaret |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Nurse |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
New York, …
Other, age 32
New York, New York · implied b. ~1888 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Margaret |
| Relationship to Head | Nurse |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1909 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Nurse |
| Industry | Hospital O.A. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
New York, …
Other, age 42
New York, New York · implied b. ~1888 — 18 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Margaret |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Bronx-County, New …
Spouse, age 52
Bronx-County, New York · implied b. ~1888 — 5 household members
| Surname | McDermott |
| Given Name | Mary J. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Bronx |
| Naturalization Status | Naturalized |
| Industry | 0 |
| Highest Grade | G 4 |
| 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 Mary Mcdermott across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcdermott
Spouse · 1940 · age 52 · b. ~1888 · 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 — Bronx-County, New York
Open full size
1940 US Federal Census — Bronx-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02482-00283)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jill, George Johnston | 16 | boarder | — | New York |
| 42 | Jill, Vivian Johnston | 15 | boarder | — | New York |
| 43 | Jill, Joan Johnston | 12 | boarder | — | New York |
| 44 | Robert F. Johnston | 35 | head | Credit Manager | New York |
| 45 | Ruth Johnston | 30 | wife | Statistician | New York |
| 46 | Peter Mcdermott | 60 | head | Carpenter | Ireland |
| 47 | Mary J. Mcdermott THIS PERSON | 52 | wife | — | Ireland |
| 48 | Catherine Mcdermott | 28 | daughter | Clerk | New York |
| 49 | John J. Mcdermott | 26 | son | Draftsman | New York |
| 50 | Edward Mcdermott | 23 | son | — | New York |
| 51 | Raymond Law | 43 | head | Engineer | New Jersey |
| 52 | Kathleen Law | 36 | wife | — | New York |
| 53 | Kathleen Law | 15 | daughter | — | New York |
| 54 | Thomas O'Mara | 42 | head | Fireman | Ireland |
| 55 | Annie O'Mara | 40 | wife | — | Ireland |
| 56 | Thomas O'Mara | 17 | son | Messenger Boy | New York |
| 57 | James O'Mara | 14 | son | — | New York |
| 58 | Robert J. O'Mara | 12 | son | — | New York |
| 59 | Joan O'Mara | 2 | daughter | — | New York |
| 60 | Ernest Thunman | 40 | head | Fireman | New York |
| 61 | Vincy Thunman | 34 | wife | — | New York |
| 62 | Carmelita Thunman | 5 | daughter | — | New York |
| 63 | Mary A. Thunman | 2 | daughter | — | New York |
| 64 | Evelyn Thunman | 65 | mother | — | New York |
| 65 | Henry Pike | 67 | head | — | Germany |
| 66 | Anastasia Pike | 65 | wife | — | New York |
| 67 | Raymond Pike | 39 | son | Draftsman | New York |
| 68 | Jerome Pike | 38 | son | Helper | New York |
| 69 | Edward Johnson | 41 | head | Supt. | Newfoundland |
| 70 | Alice Johnson | 40 | wife | — | Newfoundland |
| 71 | Francis Johnson | 14 | son | — | Newfoundland |
| 72 | Theresa Flagan | 25 | sister-in-law | Operator | Newfoundland |
| 73 | Constantino Laguidera | 35 | head | Teacher | New York |
| 74 | Dora Laguidera | 29 | wife | — | New York |
| 75 | Rosalina Laguidera | 3 | daughter | — | New York |
| 76 | Charles Katz | 37 | head | Policeman | New York |
| 77 | Anna Katz | 35 | wife | — | New Jersey |
| 78 | Arnold Katz | 14 | son | — | New Jersey |
| 79 | Julius Reder | 70 | head | — | Austria |
| 80 | Hermina Reder | 65 | wife | — | Austria |
Related Census Records
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)