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Mary Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Mcnamara across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McNamara |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcnamara | Daughter | — | 15 | ~1925 |
| Bernard Mcnamara | Head | — | 44 | ~1896 |
| Joy Dorr | Other | — | 70 | ~1870 |
| Edward Mcnamara | Son | — | 11 | ~1929 |
| Richard Mcnamara | Son | — | 12 | ~1928 |
| Bernard Mcnamara | Son | — | 16 | ~1924 |
| Leonard Mcnamara | Son | — | 9 | ~1931 |
| Robert Mcnamara | Son | — | 6 | ~1934 |
| William Mcnamara | Son | — | 3 | ~1937 |
| Walter Mcnamara | Son | — | 7 | ~1933 |
| Margaret Mcnamara | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 5
Middlesex, Massachusetts · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 11 household members
| Surname | McNamara |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mcnamara across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcnamara
Daughter · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
Richard Mcnamara
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Mcnamara
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mcnamara
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcnamara
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcnamara
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcnamara
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Mcnamara
Sibling · 1940 · age 9
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01608-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Catherina | 20 | daughter | Sewing Machine Operator | Massachusetts |
| 42 | Eugene S. Aron | 61 | head | Marine Engineer | Maine |
| 43 | Eva Aron | 57 | wife | — | Canada-Eng |
| 44 | Selden Aron | 30 | son | Accountant | Massachusetts |
| 45 | Ralph Scott | 60 | lodger | Cashier | Rhode Island |
| 46 | William T. Daley | 37 | head | Postman | Massachusetts |
| 47 | Helen Daley | 34 | wife | — | Massachusetts |
| 48 | William T. Daley | 9 | son | — | Massachusetts |
| 49 | Donald E. Daley | 6 | son | — | Massachusetts |
| 50 | Anna O'Leary | 72 | head | — | Irish Free State |
| 51 | Nora O'Leary | 46 | daughter | — | Canada |
| 52 | Mary E. Mccallum | 29 | daughter | Payroll Clerk | Massachusetts |
| 53 | Frank R. Mccallum | 29 | son-in-law | Assembler | Massachusetts |
| 54 | James T. O'Leary | 12 | grandson | — | Massachusetts |
| 55 | Bernard Mcnamara | 44 | head | Night Watchman | Massachusetts |
| 56 | Margaret Mcnamara | 44 | wife | — | Massachusetts |
| 57 | Bernard Mcnamara | 16 | son | — | Massachusetts |
| 58 | Mary L. Mcnamara THIS PERSON | 15 | daughter | — | Massachusetts |
| 59 | Richard Mcnamara | 12 | son | — | Massachusetts |
| 60 | Edward Mcnamara | 11 | son | — | Massachusetts |
| 61 | Leonard Mcnamara | 9 | son | — | Massachusetts |
| 62 | Walter Mcnamara | 7 | son | — | Massachusetts |
| 63 | Robert Mcnamara | 6 | son | — | Massachusetts |
| 64 | William Mcnamara | 3 | son | — | Massachusetts |
| 65 | Joy Dorr | 70 | lodger | Stationary Engineer | Massachusetts |
| 66 | Ernest F. Dargie | 53 | head | Route Salesman | Canada-Eng |
| 67 | Dorothy M. Dargie | 52 | wife | — | Canada-Eng |
| 68 | Victor Dargie | 24 | son | Counter Clerk | Canada-Eng |
| 69 | Alfred Sorenson | 35 | head | Store Manager | Massachusetts |
| 70 | Marie Sorenson | 32 | wife | — | Massachusetts |
| 71 | Ann Sorenson | 8 | daughter | — | Massachusetts |
| 72 | Ronald Miller | 30 | head | Auto Body | Massachusetts |
| 73 | Evelyn Miller | 31 | wife | — | Massachusetts |
| 74 | Marilyn Miller | 4 | daughter | — | Massachusetts |
| 75 | Maud Johns | 61 | mother-in-law | — | Massachusetts |
| 76 | Sylvester Devlin | 54 | head | Bookkeeper | Massachusetts |
| 77 | Mary Devlin | 51 | wife | — | Canada-Eng |
| 78 | Elizabeth Devlin | 17 | daughter | — | Canada-Eng |
| 79 | Clyde Correau | 32 | head | Shipper Clerk | Canada-Fr |
| 80 | Corinne Correau | 31 | wife | — | Canada-Fr |
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)