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Margaret Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this Margaret Mcnamara across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Female
Daughter
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Oyster Bay |
| 1935 Residence (County) | Nassau |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Kitchen maid |
| Industry | Private estate |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Kitchen Maid |
| Township / Ward | Oyster Bay |
| 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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| John Mcnamara | Head | — | 66 | ~1874 |
| James Mcnamara | Son | — | 21 | ~1919 |
| Mary Mcnamara | Spouse | — | 52 | ~1888 |
| Patrick Mcnamara | Son | — | 26 | ~1914 |
| William Mcnamara | Son | — | 14 | ~1926 |
| Thomas Mcnamara | Son | — | 23 | ~1917 |
| Margaret Mcnamara | Daughter | — | 20 | ~1920 |
Census Appearances
1930
Nassau, New …
Daughter, age 9
Nassau, New York · implied b. ~1921 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1927 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Nassau-County, New …
Daughter, age 20
Nassau-County, New York · implied b. ~1920 — 7 household members
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Oyster Bay |
| 1935 Residence (County) | Nassau |
| Naturalization Status | Naturalized |
| Occupation | Kitchen maid |
| Industry | Private estate |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 520 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Margaret Mcnamara across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Mcnamara
Daughter · 1940 · age 20 · b. ~1920 · New York
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Sibling
Patrick Mcnamara
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mcnamara
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcnamara
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcnamara
Sibling · 1940 · age 21
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 — Nassau-County, New York
Open full size
1940 US Federal Census — Nassau-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02693-00612)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith M. Mark | 42 | Wife | — | New York |
| 2 | Edith R. Mark | 13 | Niece | — | New Jersey |
| 3 | Vera T. Mark | 12 | Niece | — | New Jersey |
| 4 | Michael O'Neil | 36 | Head | Janitor | Eire |
| 5 | Julia O'Neil | 31 | Wife | — | Eire |
| 6 | Nicholas O'Neil | 6 | Son | — | New York |
| 7 | Michael O'Neil | 3 | Son | — | New York |
| 8 | Thomas Fritz Gerald | 17 | Cousin | — | New York |
| 9 | Michael Selvaggi | 55 | Head | Insurance Collector | Italy |
| 10 | Evelyn Selvaggi | 41 | Wife | — | Italy |
| 11 | Julia Selvaggi | 20 | Son | — | New York |
| 12 | Rose Selvaggi | 19 | Daughter | Dress Maker | New York |
| 13 | Humbert Selvaggi | 14 | Son | — | New York |
| 14 | Estelle Johnson | 37 | Head | — | New York |
| 15 | Eugene Johnson | 16 | Son | — | New York |
| 16 | Dorothy Johnson | 14 | Daughter | — | New York |
| 17 | John Mcnamara | 66 | Head | Night Watchman | Eire |
| 18 | Mary Mcnamara | 52 | Wife | — | Scotland |
| 19 | Patrick Mcnamara | 26 | Son | Salesman | Eire |
| 20 | Thomas Mcnamara | 23 | Son | Teacher | Scotland |
| 21 | James Mcnamara | 21 | Son | Landscaper | Scotland |
| 22 | Margaret Mcnamara THIS PERSON | 20 | Daughter | Kitchen Maid | Scotland |
| 23 | William Mcnamara | 14 | Son | — | Scotland |
| 24 | Philip Hennitren | 49 | Head | Truck Driver | New York |
| 25 | Lanzetta Hennitren | 43 | Wife | — | New York |
| 26 | Philip Hennitren | 16 | Son | — | New York |
| 27 | James Cardinale | 44 | Head | Butcher | Italy |
| 28 | Regina Cardinale | 43 | Wife | — | Italy |
| 29 | Joseph Cardinale | 24 | Son | — | New York |
| 30 | Angela Cardinale | 21 | Daughter | — | New York |
| 31 | Nina Cardinale | 20 | Daughter | New Worker | New York |
| 32 | James Cardinale | 18 | Son | — | New York |
| 33 | Lucy Cardinale | 13 | Daughter | — | New York |
| 34 | James T. Mccoun | 63 | Head | Foreman County Roads | New York |
| 35 | Josephine Mccoun | 63 | Wife | — | New Jersey |
| 36 | Raymond Hall | 61 | Head | — | New York |
| 37 | Frank Haden | 32 | Head | Oysterman | New York |
| 38 | Sara Haden | 31 | Wife | — | New York |
| 39 | George Haden | 12 | Son | — | New York |
| 40 | Mae Haden | 10 | Daughter | — | New York |
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)