MD
Mary Dyer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Dyer across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 8-person household.
Age 43
b. ~1897
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Dyer |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1897 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Dyer | Son | — | 20 | ~1920 |
| Mary Dyer | Spouse | — | 43 | ~1897 |
| Veronica Dyer | Daughter | — | 23 | ~1917 |
| Lillian Dyer | Daughter | — | 7 | ~1933 |
| Michael Dyer | Head | — | 53 | ~1887 |
| Madlyn Dyer | Daughter | — | 15 | ~1925 |
| Dolores Dyer | Daughter | — | 11 | ~1929 |
| Thomas Dyer | Son | — | 18 | ~1922 |
Census Appearances
1930
Middlesex, Massachusetts
Spouse, age 30
Middlesex, Massachusetts · implied b. ~1900 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dyer |
| Given Name | Mary G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 17 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 43
Middlesex-County, Massachusetts · implied b. ~1897 — 8 household members
| Surname | Dyer |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Dyer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Dyer
Spouse · 1940 · age 43 · b. ~1897 · 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-t0627-01611-00672)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William S Lippman | 31 | Son | Broker | Massachusetts |
| 2 | Lippman | None | — | — | — |
| 3 | Edward E. Elder | 60 | Head | Lawyer | Massachusetts |
| 4 | Dulcie E. Elder | 39 | Wife | — | Tennessee |
| 5 | Genevieve Elder | 5 | Daughter | — | Massachusetts |
| 6 | Mary E Hall | 73 | Mother-in-law | Copy Editor | Tennessee |
| 7 | Alfred Reed | 62 | Head | Traveling Salesman | Massachusetts |
| 8 | Charlotte Reed | 60 | Wife | — | Massachusetts |
| 9 | Albert Higgins | 58 | Head | Salesman | Massachusetts |
| 10 | Catherine Higgins | 55 | Wife | — | Massachusetts |
| 11 | Agnes Higgins | 29 | Daughter | Secretary | Massachusetts |
| 12 | Louis Chadbourne | 44 | Head | Salesman | Massachusetts |
| 13 | Ethel V. Chadbourne | 43 | Wife | — | Massachusetts |
| 14 | Barbara B Chadbourne | 6 | Daughter | — | Massachusetts |
| 15 | Ellen E. Smith | 67 | Mother-in-law | — | Massachusetts |
| 16 | Eva M Smith | 44 | Daughter-in-law | Nurse | Massachusetts |
| 17 | Jessie A Rockwell | 65 | Head | — | Massachusetts |
| 18 | Lawrence Munro | 30 | Son-in-law | Elec. Engineer | Massachusetts |
| 19 | Dorothy R Munro | 33 | Daughter | — | Massachusetts |
| 20 | David R Munro | 3 | Grandson | — | Massachusetts |
| 21 | Harry B. Ballou | 79 | Head | — | Massachusetts |
| 22 | Nellie Ballou | 72 | Wife | — | Massachusetts |
| 23 | Elsa Kaiser | 45 | Servant | Maid | Canada |
| 24 | Janie R Greene | 63 | Servant | Housekeeper | Canada |
| 25 | Michael A Dyer | 53 | Head | Architect | Massachusetts |
| 26 | Mary A Dyer THIS PERSON | 43 | Wife | — | Massachusetts |
| 27 | Veronica Dyer | 23 | Daughter | Teacher | Massachusetts |
| 28 | John M Dyer | 20 | Son | New Worker | Massachusetts |
| 29 | Thomas Dyer | 18 | Son | — | Massachusetts |
| 30 | Madlyn Dyer | 15 | Daughter | — | Massachusetts |
| 31 | Dolores Dyer | 11 | Daughter | — | Massachusetts |
| 32 | Lillian Dyer | 7 | Daughter | — | Massachusetts |
| 33 | Vernon Harris | 56 | Head | Carpenter | Massachusetts |
| 34 | Ellen Harris | 54 | Wife | — | Massachusetts |
| 35 | Evelyn Harris | 24 | Daughter | Dressmaker | Massachusetts |
| 36 | Dorothy J. Harris | 19 | Daughter | Case Clerk | Massachusetts |
| 37 | Barbara Harris | 17 | Daughter | — | Massachusetts |
| 38 | Vina Harris | 15 | Daughter | — | Massachusetts |
| 39 | Pearl Simmons | 26 | Lodger | — | Massachusetts |
| 40 | Frances Appleby | 80 | Lodger | None | Canada |
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)