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Mary Boyle — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Boyle across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 7-person household.
Age 58
b. ~1882
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Boyle |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | City of Cambridge |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | none |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | City Of Cambridge |
| Est. Birth Year | ~1882 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Joan Boyle | Daughter | — | 21 | ~1919 |
| Anna Boyle | Daughter | — | 28 | ~1912 |
| Florence Boyle | Daughter | — | 23 | ~1917 |
| William Boyle | Head | — | 57 | ~1883 |
| James Boyle | Son | — | 18 | ~1922 |
| Francis Boyle | Son | — | 25 | ~1915 |
| Mary Boyle | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 38
Middlesex, Massachusetts · implied b. ~1882 — 14 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyle |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | england |
1930
Middlesex, Massachusetts
Spouse, age 48
Middlesex, Massachusetts · implied b. ~1882 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyle |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1887 |
| Age at First Marriage | 18 |
| Father's Birthplace | England |
| Mother's Birthplace | Wales |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Middlesex-County, Massachusetts
Spouse, age 58
Middlesex-County, Massachusetts · implied b. ~1882 — 7 household members
| Surname | Boyle |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | City of Cambridge |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | none |
| Income (1939) | 0 |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Boyle across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Boyle
Spouse · 1940 · age 58 · b. ~1882 · Massachusetts
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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 — 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-t0627-01684-00217)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine Ryan | 50 | Lodger | Factory | Massachusetts |
| 42 | Richard Mckinnon | 50 | Son | Watch Repair | Massachusetts |
| 43 | Mary Mckinnon | 45 | Daughter | None | Massachusetts |
| 44 | Catherine Mckinnon | 37 | Daughter | Floor Clerk | Massachusetts |
| 45 | Joseph Mckinnon | 35 | Son | Engraver | Massachusetts |
| 46 | Julia Travers | 72 | Head | None | Portugal |
| 47 | Chris Travers | 49 | Son | Janitor | Massachusetts |
| 48 | Arthur F. Travers | 14 | Grandson | New Worker | Massachusetts |
| 49 | Manuel Mello | 55 | Head | Police Officer | Massachusetts |
| 50 | Mary Mello | 52 | Wife | None | Massachusetts |
| 51 | William Mello | 24 | Son | Clerk | Massachusetts |
| 52 | Eugene Mello | 30 | Head | Reporter | Massachusetts |
| 53 | Hilda Mello | 26 | Wife | Hairdresser | Massachusetts |
| 54 | Emanuel Mello | 2 | Son | — | Massachusetts |
| 55 | Charles Lowry | 46 | Head | Optician | Massachusetts |
| 56 | Alice Lowry | 47 | Wife | Reg. Nurse | New Hampshire |
| 57 | Charles Lowry | 12 | Son | — | Massachusetts |
| 58 | Mary Lowry | 9 | Daughter | — | Massachusetts |
| 59 | Ann Lowry | 58 | Sister | Bookkeeper | Massachusetts |
| 60 | William Lowry | 62 | Brother | Cashier | Massachusetts |
| 61 | Lucille Killer | 21 | Niece | Teacher | New Hampshire |
| 62 | Mary Foster | 74 | Head | None | Massachusetts |
| 63 | Mildred Foster | 31 | Daughter | Teacher | Massachusetts |
| 64 | Raymond Scott | 34 | Son-in-law | Teacher | Massachusetts |
| 65 | Mary Scott | 36 | Daughter | Teacher (Subst) | Massachusetts |
| 66 | William Kaler | 24 | Grandson | Office | Massachusetts |
| 67 | Edith Kaler | 20 | Granddaughter | — | Massachusetts |
| 68 | William F. Boyle | 57 | Head | Investigator | Massachusetts |
| 69 | Mary Boyle THIS PERSON | 58 | Wife | None | England |
| 70 | Francis X. Boyle | 25 | Son | — | Massachusetts |
| 71 | Anna T. Boyle | 28 | Daughter | None | Massachusetts |
| 72 | Florence M. Boyle | 23 | Daughter | Researcher | Massachusetts |
| 73 | Joan J. Boyle | 21 | Daughter | Cleaner | Massachusetts |
| 74 | James Boyle | 18 | Son | New Worker | Massachusetts |
| 75 | Philip Mcgavern | 39 | Head | Inst. Doctor | Massachusetts |
| 76 | Blanche Mcgavern | 40 | Wife | Housewife | Massachusetts |
| 77 | Philip A. Mcgavern | 5 | Son | — | Massachusetts |
| 78 | Arthur Mcgavern | 3 | Son | — | Massachusetts |
| 79 | Sheila Mcgavern | 3 | Daughter | — | Massachusetts |
| 80 | Edna Domenick | 19 | Lodger | Maid | 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)