MD
Mary Duggan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Duggan across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1906), then head of a 8-person household.
Age 34
b. ~1906
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Clerk - Steno. |
| Industry | Oil Co |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 1370 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk - Steno. |
| Township / Ward | Boston City |
| Est. Birth Year | ~1906 |
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 |
|---|---|---|---|---|
| Alice Duggan | Daughter | — | 36 | ~1904 |
| Eleanor Duggan | Daughter | — | 32 | ~1908 |
| Mary Duggan | Daughter | — | 34 | ~1906 |
| Julia Duggan | Spouse | — | 66 | ~1874 |
| Patrick Duggan | Head | — | 65 | ~1875 |
| Theresa Duggan | Daughter | — | 30 | ~1910 |
| Hubert Duggan | Son | — | 38 | ~1902 |
| Frederick Duggan | Son | — | 26 | ~1914 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 24
Suffolk, Massachusetts · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Ledger Clerk |
| Industry | Drug Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 34
Suffolk-County, Massachusetts · implied b. ~1906 — 8 household members
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Clerk - Steno. |
| Industry | Oil Co |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 1370 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| 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 Duggan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duggan
Daughter · 1940 · age 34 · b. ~1906 · Massachusetts
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Sibling
Eleanor Duggan
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Duggan
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Duggan
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Duggan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hubert Duggan
Sibling · 1940 · age 38
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-t0627-01671-00118)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas White | 42 | Head | Carpenter | Maine |
| 2 | Mary White | 39 | Wife | — | Rhode Island |
| 3 | Alfred Verselline | 32 | Lodger | Stone Fitter | Mass. |
| 4 | Ruth Verselline | 20 | Lodger | Nurse Attendant | Massachusetts |
| 5 | Patrick Mclaughlin | 26 | Head | Clerk | Massachusetts |
| 6 | Laura Mclaughlin | 28 | Wife | — | Massachusetts |
| 7 | Mary Mclaughlin | 4 | Daughter | — | Massachusetts |
| 8 | Emma Kloke | 53 | Head | — | New York |
| 9 | Marie Kloke | 22 | Daughter | Bookkeeper | Maryland |
| 10 | Francis Bagley | 28 | Head | Salesman | Massachusetts |
| 11 | Ruth Bagley | 27 | Wife | — | Mass. |
| 12 | Claire Bagley | 3 | Daughter | — | Massachusetts |
| 13 | Joan Bagley | 1 | Daughter | — | Massachusetts |
| 14 | James Bagley | 0 | Son | — | Massachusetts |
| 15 | Elizabeth Hubner | 56 | Mother in law | — | Massachusetts |
| 16 | Timothy Sullivan | 51 | Head | Clerk | Massachusetts |
| 17 | Esther Sullivan | 50 | Wife | — | Massachusetts |
| 18 | John Sullivan | 27 | Brother | — | Massachusetts |
| 19 | Mary Rosemond | 45 | Head | — | Massachusetts |
| 20 | Francis Rosemond | 14 | Son | — | Massachusetts |
| 21 | Theresa Rosemond | 12 | Daughter | — | Massachusetts |
| 22 | Anne Rosemond | 8 | Daughter | — | Massachusetts |
| 23 | Anne Pumphrey | 37 | Head | — | Newfoundland |
| 24 | Lewis Pumphrey | 13 | Son | — | Massachusetts |
| 25 | Alice Pumphrey | 10 | Daughter | — | Massachusetts |
| 26 | Patrick Duggan | 65 | Head | — | Irish Free State |
| 27 | Julia Duggan | 66 | Wife | — | Eire |
| 28 | Hubert Duggan | 38 | Son | Truck Driver | Massachusetts |
| 29 | Alice Duggan | 36 | Daughter | Telephone Operator | Massachusetts |
| 30 | Mary Duggan THIS PERSON | 34 | Daughter | Clerk - Steno. | Massachusetts |
| 31 | Eleanor Duggan | 32 | Daughter | Clerk | Massachusetts |
| 32 | Theresa Duggan | 30 | Daughter | — | Massachusetts |
| 33 | Frederick Duggan | 26 | Son | New Worker | Massachusetts |
| 34 | James Porter | 43 | Head | Laborer | Scotland |
| 35 | Williamina Porter | 48 | Wife | — | North Ireland |
| 36 | James Porter | 13 | Son | — | Massachusetts |
| 37 | Henry Porter | 12 | Son | — | Mass. |
| 38 | William Porter | 11 | Son | — | Mass. |
| 39 | Mary Porter | 9 | Daughter | — | Mass. |
| 40 | Ruby Porter | 8 | Daughter | — | Mass. |
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)