WM
William Macdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Macdonald across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1926 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Macdonald | Daughter | — | 13 | ~1927 |
| Kenneth Macdonald | Son | — | 9 | ~1931 |
| John Macdonald | Son | — | 17 | ~1923 |
| John Macdonald | Head | — | 44 | ~1896 |
| Muriel Macdonald | Spouse | — | 44 | ~1896 |
| Gerald Macdonald | Son | — | 14 | ~1926 |
| William Macdonald | Son | — | 14 | ~1926 |
| Catherine Macdonald | Daughter | — | 17 | ~1923 |
| Katherine Langan | Other | — | 42 | ~1898 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 4
Middlesex, Massachusetts · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| 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
Son, age 14
Middlesex-County, Massachusetts · implied b. ~1926 — 9 household members
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 William Macdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Macdonald
Son · 1940 · age 14 · b. ~1926 · Massachusetts
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Sibling
John Macdonald
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Macdonald
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Macdonald
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Macdonald
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Macdonald
Sibling · 1940 · age 17
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-t0627-01608-00507)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Laura Thorndike | 50 | Head | Salesman | Massachusetts |
| 2 | Lillian Thorndike | 47 | Wife | — | Massachusetts |
| 3 | Alfred Reeves | 53 | Head | — | Canada Fr. |
| 4 | Blanche Reeves | 52 | Wife | — | Canada Fr. |
| 5 | Norman Reeves | 24 | Son | Attendant | Massachusetts |
| 6 | Lorraine Reeves | 22 | Daughter | — | Massachusetts |
| 7 | Jeremiah Macdonald | 75 | Head | — | Canada Eng |
| 8 | William Macdonald | 41 | Son | Traveling Salesman | Massachusetts |
| 9 | Adela Palfrey | 63 | Head | — | Massachusetts |
| 10 | Mary Shillady | 39 | Head | Billing Clerk | Massachusetts |
| 11 | Elizabeth Riley | 51 | Lodger | Waitress | Massachusetts |
| 12 | Ralph Bennister | 30 | Lodger | Colorist | Massachusetts |
| 13 | Clarence Gutter | 39 | Lodger | Foreman (Asst) | Massachusetts |
| 14 | Margaret Mielbye | 74 | Head | — | Ireland |
| 15 | Mary Mielbye | 40 | Daughter | Bookkeeper | Massachusetts |
| 16 | Laura Lambert | 72 | Head | — | Canada Eng |
| 17 | Doris Lambert | 44 | Daughter | Bookkeeper | Massachusetts |
| 18 | William Balcom | 44 | Head | Electrician | Canada Eng |
| 19 | Catherine Balcom | 34 | Wife | R. Nurse | Canada Eng |
| 20 | Darlene Balcom | 21 | Daughter | New Worker | Massachusetts |
| 21 | Roger Balcom | 15 | Son | — | Massachusetts |
| 22 | John Macdonald | 44 | Head | Manager | Massachusetts |
| 23 | Muriel Macdonald | 44 | Wife | — | Massachusetts |
| 24 | John Jr. Macdonald | 17 | Son | — | Massachusetts |
| 25 | Catherine Macdonald | 17 | Daughter | — | Massachusetts |
| 26 | William Macdonald THIS PERSON | 14 | Son | — | Massachusetts |
| 27 | Gerald Macdonald | 14 | Son | — | Massachusetts |
| 28 | Elizabeth Macdonald | 13 | Daughter | — | Massachusetts |
| 29 | Kenneth Macdonald | 9 | Son | — | Massachusetts |
| 30 | Katherine Langan | 42 | Sister in law | — | Massachusetts |
| 31 | James West | 52 | Head | Proprietor | England |
| 32 | Emily West | 46 | Wife | Nurse R. | England |
| 33 | Leonard West | 25 | Son | Mechanic | England |
| 34 | Brenda West | 23 | Daughter | New Worker | England |
| 35 | Mary Gough | 86 | Lodger | — | Siberia |
| 36 | Roland Blakeney | 25 | Head | Janitor | Massachusetts |
| 37 | Mary Blakeney | 22 | Wife | — | Massachusetts |
| 38 | Edward V. Mckenna | 33 | Head | Clerk | Massachusetts |
| 39 | Helen Mckenna | 31 | Wife | Typist | Massachusetts |
| 40 | Ella M. Mckenna | 62 | Mother | — | Canada Eng |
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)