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Mary Mcdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Mcdonald across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 4-person household.
Age 55
b. ~1885
Female
Spouse
Born: Nova Scotia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McDonald |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Nova Scotia |
| 1935 Residence (City) | Canada |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birthplace (normalized) | nova scotia |
| Township / Ward | Boston |
| Est. Birth Year | ~1885 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mabel Mcdonald | Daughter | — | 33 | ~1907 |
| William Mcdonald | Head | — | 58 | ~1882 |
| Joseph Mcdonald | Son | — | 25 | ~1915 |
| Mary Mcdonald | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Middlesex, Massachusetts
Other, age 32
Middlesex, Massachusetts · implied b. ~1888 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Macdonald |
| Given Name | Mary C. |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Nova Scotia |
| Year of Immigration | 1890 |
| Naturalization Status | Alien |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Nova Scotia |
| Occupation | Servant |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | nova scotia |
1930
Middlesex, Massachusetts
Other, age 45
Middlesex, Massachusetts · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Macdonald |
| Given Name | Mary |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Nova Scotia |
| Naturalization Status | First papers filed |
| Year of Immigration | 1905 |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Nova Scotia |
| Occupation | Saleslady |
| Industry | Hair Dressing |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | nova scotia |
1940
Suffolk-County, Massachusetts
Spouse, age 55
Suffolk-County, Massachusetts · implied b. ~1885 — 4 household members
| Surname | McDonald |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Nova Scotia |
| 1935 Residence (City) | Canada |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birthplace (normalized) | nova scotia |
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 Mcdonald 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 Mcdonald
Spouse · 1940 · age 55 · b. ~1885 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01644-00715)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Couillard | 77 | Head | Inspector | Massachusetts |
| 42 | Cora M. Couillard | 49 | Daughter | — | Massachusetts |
| 43 | John W. Christofer | 42 | Head | Port Engineer | Alfonso |
| 44 | Eleanor M. Christofer | 35 | Wife | — | Massachusetts |
| 45 | John W. Jr. Christofer | 4 | Son | — | Massachusetts |
| 46 | Edmond P. Christofer | 29 | Brother | Engineer | Alfonso |
| 47 | Kenneth Mcclure | 30 | Head | Salesman | Massachusetts |
| 48 | Alice J. Mcclure | 30 | Wife | Salesgirl | Massachusetts |
| 49 | Dennis J. Murphy | 70 | Father | — | Massachusetts |
| 50 | Mary A. Murphy | 68 | Mother | — | Massachusetts |
| 51 | John O. Murphy | 36 | Brother-in-law | Surveyor | Massachusetts |
| 52 | Elizabeth Eyckel | 56 | Head | — | Newfoundland |
| 53 | Thomas J. Eyckel | 31 | Son | Stock-Bond | Massachusetts |
| 54 | Helene Eyckel | 29 | Daughter | Bookkeeper | Massachusetts |
| 55 | William P. Eyckel | 27 | Son | — | Massachusetts |
| 56 | John G. Eyckel | 21 | Son | Elevator Boy | Massachusetts |
| 57 | Elizabeth P. Eyckel | 18 | Daughter | — | Massachusetts |
| 58 | James W. Eyckel | 13 | Son | — | Massachusetts |
| 59 | Joseph A. Howard | 53 | Head | Office Manager | Massachusetts |
| 60 | Ellen A. Howard | 53 | Wife | — | Massachusetts |
| 61 | Jean M. Howard | 23 | Daughter | Clerk | Massachusetts |
| 62 | Edward F. Sullivan | 69 | Head | Salesman | Massachusetts |
| 63 | Mary C. Sullivan | 67 | Wife | — | Massachusetts |
| 64 | Helen A. Sullivan | 37 | Daughter | Secretary | Massachusetts |
| 65 | Sarah Smith | 57 | Head | — | Fakaragh |
| 66 | Eleanor M. Smith | 30 | Daughter | Clerk | Massachusetts |
| 67 | Louis V. Smith | 19 | Son | Newspaper Boy | Massachusetts |
| 68 | Grace M. Smith | 16 | Daughter | — | Massachusetts |
| 69 | Peter M. Peterson | 58 | Head | Captain | Egersund |
| 70 | Inga Peterson | 55 | Wife | — | Sandnessjoen |
| 71 | Francis Peterson | 28 | Son | Yachtsman | Massachusetts |
| 72 | Daniel Cunningham | 55 | Lodger | Policeman | Massachusetts |
| 73 | Isidore B. Tornrose | 67 | Head | Sales Manager | Lilla Edith |
| 74 | Matilda Tornrose | 64 | Wife | — | Ersingboda |
| 75 | William H. Mcdonald | 58 | Head | Builder | Nova Scotia |
| 76 | Mary E. Mcdonald THIS PERSON | 55 | Wife | — | Nova Scotia |
| 77 | Mabel T. Mcdonald | 33 | Daughter | Bookkeeper | Massachusetts |
| 78 | Joseph Mcdonald | 25 | Son | Cabinet Maker | 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)