MD
Mary Dillon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Dillon across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 9-person household.
Age 29
b. ~1911
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Dillon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Operator |
| Industry | Box Company |
| Class of Worker | PW |
| Hours Worked | 37 |
| Income (1939) | 832 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Operator |
| Township / Ward | Boston City |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| Mary Dillon | Daughter | — | 29 | ~1911 |
| Catherine Barrono | Daughter | — | 34 | ~1906 |
| Margaret Dillon | Daughter | — | 24 | ~1916 |
| Sarah Capone | Daughter | — | 28 | ~1912 |
| Martin Dillon | Head | — | 70 | ~1870 |
| Claire Capone | Other | — | 6 | ~1934 |
| Marie Capone | Other | — | 2 | ~1938 |
| Patrick Dillon | Son | — | 26 | ~1914 |
| Mary Dillon | Spouse | — | 68 | ~1872 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 19
Suffolk, Massachusetts · implied b. ~1911 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dillon |
| Given Name | Mary |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Student Nurse |
| Industry | Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 29
Suffolk-County, Massachusetts · implied b. ~1911 — 9 household members
| Surname | Dillon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Operator |
| Industry | Box Company |
| Class of Worker | PW |
| Hours Worked | 37 |
| Income (1939) | 832 |
| Highest Grade | No 5 |
| 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 Dillon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dillon
Daughter · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Patrick Dillon
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Dillon
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Barrono
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Capone
Sibling · 1940 · age 28
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01664-00785)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nicholas Griffin | 13 | Son | — | Massachusetts |
| 2 | Louis Griffin | 9 | Son | — | Massachusetts |
| 3 | Georgianna Griffin | 7 | Daughter | — | Massachusetts |
| 4 | Dorothy Griffin | 7 | Daughter | — | Massachusetts |
| 5 | Michael Griffin | 43 | Head | Letter Carrier | Massachusetts |
| 6 | Anna Griffin | 41 | Wife | — | Massachusetts |
| 7 | James Griffin | 19 | Son | Peddler | Massachusetts |
| 8 | Margaret Griffin | 17 | Daughter | — | Massachusetts |
| 9 | Anna Griffin | 13 | Daughter | — | Massachusetts |
| 10 | Gertrude Griffin | 9 | Daughter | — | Massachusetts |
| 11 | Michael Griffin | 2 | Son | — | Massachusetts |
| 12 | Theodore La Place | 28 | Head | Stock Clerk | Vermont |
| 13 | Rose La Place | 27 | Wife | — | Massachusetts |
| 14 | Thomas F. Mc Carthy | 46 | Head | Chauffeur | Massachusetts |
| 15 | Mary Mc Carthy | 42 | Wife | — | Massachusetts |
| 16 | Mary Mc Carthy | 24 | Daughter | Inspector | Massachusetts |
| 17 | Dorothea Mc Carthy | 19 | Daughter | Inspector | Massachusetts |
| 18 | James Cavanaugh | 13 | Nephew | — | Massachusetts |
| 19 | Martin Dillon | 70 | Head | — | Eire |
| 20 | Mary Dillon | 68 | Wife | — | Eire |
| 21 | Mary Dillon THIS PERSON | 29 | Daughter | Operator | Massachusetts |
| 22 | Margaret Dillon | 24 | Daughter | Inspector | Massachusetts |
| 23 | Patrick Dillon | 26 | Son | — | Massachusetts |
| 24 | Catherine Barrono | 34 | Daughter | Inspector | Massachusetts |
| 25 | Sarah Capone | 28 | Daughter | Operator | Massachusetts |
| 26 | Claire Capone | 6 | Granddaughter | — | Massachusetts |
| 27 | Marie Capone | 2 | Granddaughter | — | Massachusetts |
| 28 | Anna Naslenas | 50 | Head | — | Lithuania |
| 29 | Adello Naslenas | 16 | Daughter | — | Massachusetts |
| 30 | George B. Jennings | 33 | Head | — | Massachusetts |
| 31 | Florence R. Jennings | 30 | Wife | — | Massachusetts |
| 32 | Florence A. Jennings | 7 | Daughter | — | Massachusetts |
| 33 | Joan Jennings | 5 | Daughter | — | Massachusetts |
| 34 | George Jennings | 4 | Son | — | Massachusetts |
| 35 | Arlene Jennings | 1 | Daughter | — | Massachusetts |
| 36 | Paul O'Connor | 40 | Head | — | Eire |
| 37 | Justine O'Connor | 31 | Wife | — | Minnesota |
| 38 | Ellen C. O'Connor | 1 | Daughter | — | Massachusetts |
| 39 | Hugh Fitzgerald | 78 | Head | — | Eire |
| 40 | Annie Fitzgerald | 75 | Wife | — | Eire |
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)