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Mary Mcnamara — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this Mary Mcnamara across the 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | McNamara |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Leominster |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Leominster |
| Est. Birth Year | ~1928 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Barbara Mcnamara | Daughter | — | 6 | ~1934 |
| Mary Mcnamara | Daughter | — | 12 | ~1928 |
| Winifred Mcnamara | Daughter | — | 8 | ~1932 |
| Charles Mcnamara | Head | — | 55 | ~1885 |
| Bryan Mcnamara | Son | — | 4 | ~1936 |
| John Mcnamara | Son | — | 1 | ~1939 |
| Michael Mcnamara | Son | — | 10 | ~1930 |
| Charles Mcnamara | Son | — | 14 | ~1926 |
| Mary Mcnamara | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Worcester, Massachusetts
Daughter, age 2
Worcester, Massachusetts · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Worcester-County, Massachusetts
Daughter, age 12
Worcester-County, Massachusetts · implied b. ~1928 — 9 household members
| Surname | McNamara |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Leominster |
| 1935 Residence (County) | Worcester |
| Highest Grade | No 6 |
| 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 12 · b. ~1928 · Massachusetts
★ You are viewing this record
Sibling
Barbara Mcnamara
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Winifred Mcnamara
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bryan Mcnamara
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcnamara
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mcnamara
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Mcnamara
Sibling · 1940 · age 10
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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01651-00548)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth David | 20 | Daughter | — | Massachusetts |
| 2 | Katherine David | 1 | Daughter | — | Massachusetts |
| 3 | Carrie Woods | 85 | Lodger | — | Massachusetts |
| 4 | Edward H. Pollock | 58 | Head | Painter | Massachusetts |
| 5 | Barbara Pollock | 54 | Wife | — | Massachusetts |
| 6 | Edward Pollock | 20 | Son | Canner | Massachusetts |
| 7 | Barbara Pollock | 18 | Daughter | Cementer | Massachusetts |
| 8 | Mary Pollock | 16 | Daughter | Packer | Massachusetts |
| 9 | Janet Pollock | 14 | Daughter | — | Massachusetts |
| 10 | Marilyn Pollock | 12 | Daughter | — | Massachusetts |
| 11 | Rose Pollock | 10 | Daughter | — | Massachusetts |
| 12 | Charles Mcnamara | 55 | Head | Veneer Layer | Eire |
| 13 | Mary Mcnamara | 36 | Wife | — | Eire |
| 14 | Charles M. Mcnamara | 14 | Son | — | Massachusetts |
| 15 | Mary Mcnamara THIS PERSON | 12 | Daughter | — | Massachusetts |
| 16 | Michael Mcnamara | 10 | Son | — | Massachusetts |
| 17 | Winifred Mcnamara | 8 | Daughter | — | Massachusetts |
| 18 | Barbara Mcnamara | 6 | Daughter | — | Massachusetts |
| 19 | Bryan Mcnamara | 4 | Son | — | Massachusetts |
| 20 | John Mcnamara | 1 | Son | — | Massachusetts |
| 21 | Calixte Boucher | 59 | Head | Wpa | Massachusetts |
| 22 | Catherine Boucher | 49 | Wife | — | Massachusetts |
| 23 | Janet Boucher | 17 | Daughter | — | Massachusetts |
| 24 | Phillip Boucher | 16 | Son | Laborer | Massachusetts |
| 25 | Kathleen Boucher | 15 | Daughter | — | Massachusetts |
| 26 | Rita Boucher | 13 | Daughter | — | Massachusetts |
| 27 | Minas Ermekjian | 69 | Head | — | Turkey |
| 28 | Louisa Ermekjian | 64 | Wife | — | Turkey |
| 29 | Didier A. Beland | 73 | Head | — | French Canada |
| 30 | Victoria Beland | 72 | Wife | — | French Canada |
| 31 | George M. Loin | 75 | Head | — | Norway |
| 32 | Thea G. Loin | 63 | Wife | — | Norway |
| 33 | George F. Connors | 30 | Head | Medical Doctor | Massachusetts |
| 34 | Alice A. Connors | 27 | Wife | — | Massachusetts |
| 35 | Mary A. Connors | 0 | Daughter | — | Massachusetts |
| 36 | James E. Geary | 73 | Head | — | Massachusetts |
| 37 | Elizabeth E. Geary | 36 | Daughter | Home Service | Massachusetts |
| 38 | George Marquis | 59 | Head | Printer | Massachusetts |
| 39 | Nellie Marquis | 58 | Wife | — | Massachusetts |
| 40 | Alice Marquis | 30 | Daughter | Reg. Nurse | Massachusetts |
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)