MD
Mary Dwyer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Dwyer across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 9-person household.
Age 48
b. ~1892
Female
Spouse
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Dwyer |
| Given Name | Mary K |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Somerville city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1892 |
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 |
|---|---|---|---|---|
| Elizabeth Dwyer | Daughter | — | 15 | ~1925 |
| Matthew Dwyer | Head | — | 54 | ~1886 |
| Helen Dwyer | Daughter | — | 20 | ~1920 |
| James Dwyer | Son | — | 13 | ~1927 |
| Catherine Dwyer | Daughter | — | 24 | ~1916 |
| Matthew Dwyer | Son | — | 21 | ~1919 |
| Dorothy Dwyer | Daughter | — | 17 | ~1923 |
| Mary Dwyer | Spouse | — | 48 | ~1892 |
| Francis Dwyer | Son | — | 11 | ~1929 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 39
Middlesex, Massachusetts · implied b. ~1891 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dwyer |
| Given Name | Mary K. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 21 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Middlesex-County, Massachusetts
Spouse, age 48
Middlesex-County, Massachusetts · implied b. ~1892 — 9 household members
| Surname | Dwyer |
| Given Name | Mary K |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Somerville city |
| 1935 Residence (County) | Middlesex |
| Industry | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Dwyer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dwyer
Spouse · 1940 · age 48 · b. ~1892 · 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 — 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-t0627-01705-00011)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George A Brown | 10 | Son | — | Massachusetts |
| 42 | Martha E Brown | 5 | Daughter | — | Massachusetts |
| 43 | Helena Atkinson | 21 | Lodger | Waitress | Canada-English |
| 44 | Matthew E Dwyer | 54 | Head | Mail Man | Eire |
| 45 | Mary K Dwyer THIS PERSON | 48 | Wife | — | New York |
| 46 | Catherine Dwyer | 24 | Daughter | Stenographer | Massachusetts |
| 47 | Matthew H Dwyer | 21 | Son | — | Massachusetts |
| 48 | Helen M Dwyer | 20 | Daughter | — | Massachusetts |
| 49 | Dorothy A Dwyer | 17 | Daughter | Clerical Work | Massachusetts |
| 50 | Elizabeth M Dwyer | 15 | Daughter | — | Massachusetts |
| 51 | James J Dwyer | 13 | Son | — | Massachusetts |
| 52 | Francis Dwyer | 11 | Son | — | Massachusetts |
| 53 | L. E. Sanders | 52 | Head | Copy-Holder | Massachusetts |
| 54 | Irene L. Sanders | 29 | Daughter | Billing Clerk | Massachusetts |
| 55 | Thomas A Blanche | 29 | Head | Superintendent | Massachusetts |
| 56 | Anna Blanche | 27 | Wife | — | Massachusetts |
| 57 | Barbara A Blanche | 2 | Daughter | — | Massachusetts |
| 58 | Matthew Thomas | 55 | Brother | Conductor | England |
| 59 | Irene L Thomas | 54 | Mother | — | Canada-French |
| 60 | Charles E Hester | 57 | Head | Electrician | Missouri |
| 61 | Flora B Hester | 40 | Wife | — | Massachusetts |
| 62 | Muriel V Hester | 19 | Daughter | — | Massachusetts |
| 63 | Charles E Hester | 12 | Son | — | Massachusetts |
| 64 | Frank E Edwards | 59 | Head | Stationary Engineer | Massachusetts |
| 65 | Abbie W Edwards | 64 | Wife | — | Massachusetts |
| 66 | Ruth M Edwards | 31 | Daughter | Typist | Massachusetts |
| 67 | George Edwards | 27 | Son | — | Massachusetts |
| 68 | Bridget Nolan | 66 | Head | — | Eire |
| 69 | Stephen G Nolan | 43 | Son | Accountant | Massachusetts |
| 70 | Margaret M Nolan | 39 | Daughter | Secretary | Massachusetts |
| 71 | Harriet H Stewart | 72 | Head | — | Canada-English |
| 72 | Lyman J Cole | 54 | Lodger | Office Manager | Massachusetts |
| 73 | Andrew J Buckley | 55 | Head | Conductor | Massachusetts |
| 74 | Hannah C Buckley | 50 | Wife | — | Washington |
| 75 | Verna Buckley | 25 | Daughter | Secretary | Massachusetts |
| 76 | Margaret G Sullivan | 63 | Head | — | Eire |
| 77 | Jeremiah J Donovan | 62 | Head | — | Eire |
| 78 | Nora Donovan | 62 | Wife | — | Eire |
| 79 | Joseph Donovan | 23 | Son | — | Massachusetts |
| 80 | Catherine Leahy | 5 | Grand Child | — | 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)