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.~1927), then head of a 7-person household.
Age 13
b. ~1927
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Duggan |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1927 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Duggan | Daughter | — | 4 | ~1936 |
| Thomas Duggan | Son | — | 6 | ~1934 |
| Mary Duggan | Spouse | — | 33 | ~1907 |
| Patrick Duggan | Head | — | 45 | ~1895 |
| Mary Duggan | Daughter | — | 13 | ~1927 |
| Daniel Duggan | Son | — | 11 | ~1929 |
| Patricia Duggan | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 2
Suffolk, Massachusetts · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duggan |
| Given Name | Mary T |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 13
Suffolk-County, Massachusetts · implied b. ~1927 — 7 household members
| Surname | Duggan |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| 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 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 13 · b. ~1927 · Massachusetts
★ You are viewing this record
Sibling
Daniel Duggan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Duggan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Duggan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Duggan
Sibling · 1940 · age 9
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
39 people indexed on this census page (nara:1940:m-t0627-01679-00634)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John J. Kilean|Kilian | 31 | Head | Truck Driver | Massachusetts |
| 2 | George A. Lottenburg | 31 | Head | Truck Driver | Canada English |
| 3 | Loretta R. Lottenburg | 30 | Wife | — | Massachusetts |
| 4 | George A. Jr. Lottenburg | 6 | Son | — | Massachusetts |
| 5 | Charles B. Lottenburg | 5 | Son | — | Massachusetts |
| 6 | Paul J. Lottenburg | 1 | Son | — | Massachusetts |
| 8 | Elizabeth M. Norton | 63 | Head | Matron | Massachusetts |
| 9 | Patrick J. Duggan | 45 | Head | Guard | Eire |
| 10 | Mary P. Duggan | 33 | Wife | — | Eire |
| 11 | Mary T. Duggan THIS PERSON | 13 | Daughter | — | Massachusetts |
| 12 | Daniel J. Duggan | 11 | Son | — | Massachusetts |
| 13 | Patricia A. Duggan | 9 | Daughter | — | Massachusetts |
| 14 | Thomas J. Duggan | 6 | Son | — | Massachusetts |
| 15 | Helen R. Duggan | 4 | Daughter | — | Massachusetts |
| 16 | Alfred E. Clute | 28 | Head | Sheet Metal Worker | Massachusetts |
| 17 | Elizabeth Clute | 24 | Wife | — | Massachusetts |
| 18 | Robert A. Clute | 1 | Son | — | Massachusetts |
| 19 | Arthur H. Mitchell | 48 | Head | Blacksmith | England |
| 20 | Margaret H. Mitchell | 43 | Wife | — | Massachusetts |
| 21 | Francis A. Mitchell | 22 | Son | Salesman | Massachusetts |
| 22 | Beatrice A. Mitchell | 21 | Daughter | Stenographer | Massachusetts |
| 23 | Gerard L. Mitchell | 17 | Son | — | Massachusetts |
| 24 | Delia H. Guilty | 75 | Mother | — | Massachusetts |
| 25 | Phillip A. Morin | 40 | Head | Laborer | Canada French |
| 26 | Hattie S. Morin | 35 | Wife | — | Rhode Island |
| 27 | Lula Flora Morin | 16 | Daughter | — | Rhode Island |
| 28 | William F. Morin | 14 | Son | — | Rhode Island |
| 29 | Phillip A. Jr. Morin | 9 | Son | — | Massachusetts |
| 30 | Salvatore Papia | 38 | Head | Bartender | Lithuania |
| 31 | Eva M. Papia | 33 | Wife | — | Massachusetts |
| 32 | Theodore V. Papia | 16 | Son | — | Massachusetts |
| 33 | Leona T. Papia | 12 | Daughter | — | Massachusetts |
| 34 | Edward J. Papia | 9 | Son | — | Massachusetts |
| 35 | Sylvia J. Papia | 4 | Daughter | — | Massachusetts |
| 36 | Patrick B. Gately | 76 | Head | Teamster | Eire |
| 37 | Mary A. Gately | 52 | Daughter | — | Massachusetts |
| 38 | Catherine D. Carney | 74 | Mother | — | Eire |
| 39 | Martin J. Carney | 31 | Son | Salesman | Massachusetts |
| 40 | John J. Broderick | 34 | Head | Chauffeur | 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)