MD
Mary Duggan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Duggan across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1896), then head of a 6-person household.
Age 44
b. ~1896
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Duggan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Mender |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Mender |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1896 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Duggan | Son | — | 34 | ~1906 |
| Annie Duggan | Head | — | 73 | ~1867 |
| John Duggan | Son | — | 36 | ~1904 |
| Frank Duggan | Son | — | 31 | ~1909 |
| Mary Duggan | Daughter | — | 44 | ~1896 |
| William Duggan | Son | — | 48 | ~1892 |
Census Appearances
1930
Essex, Massachusetts
Other, age 34
Essex, Massachusetts · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duggan |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 44
Essex-County, Massachusetts · implied b. ~1896 — 6 household members
| Surname | Duggan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Occupation | Mender |
| Industry | Woolen Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | H 2 |
| 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 44 · b. ~1896 · Massachusetts
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Sibling
John Duggan
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duggan
Sibling · 1940 · age 48
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Duggan
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Duggan
Sibling · 1940 · age 34
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01582-00576)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank M. Mcquade | 32 | Head | Ice Cream Maker | Massachusetts |
| 42 | Margaret C. Mcquade | 31 | Wife | Bookkeeper | Scotland |
| 43 | Elizabeth C. Mcquade | 7 | Daughter | — | Massachusetts |
| 44 | Mabel A. Mcquade | 5 | Daughter | — | Massachusetts |
| 45 | James W. Austin | 50 | Head | Chauffeur | Massachusetts |
| 46 | Anna B. Austin | 44 | Wife | — | Massachusetts |
| 47 | James Austin | 7 | Son | — | Massachusetts |
| 48 | Carol A. Austin | 4 | Daughter | — | Massachusetts |
| 49 | Annie Duggan | 73 | Head | — | Irish Free State |
| 50 | William L. Duggan | 48 | Son | Steamfitter | Massachusetts |
| 51 | Mary E. Duggan THIS PERSON | 44 | Daughter | Mender | Massachusetts |
| 52 | John A. Duggan | 36 | Son | Accountant | Massachusetts |
| 53 | Thomas F. Duggan | 34 | Son | Roofer | Massachusetts |
| 54 | Frank J. Duggan | 31 | Son | Floor Work | Massachusetts |
| 55 | Hubert J. Kelley | 50 | Head | Plumber | Massachusetts |
| 56 | Anna V. Kelley | 50 | Wife | — | Massachusetts |
| 57 | Hubert J. Kelley | 17 | Son | — | Massachusetts |
| 58 | Anne M. Kelley | 13 | Daughter | — | Massachusetts |
| 59 | Frances T. Kelley | 11 | Daughter | — | Massachusetts |
| 60 | William Kelley | 9 | Son | — | Massachusetts |
| 61 | Albert J. Wills | 65 | Head | Manager | Maine |
| 62 | Catherine A. Wills | 64 | Wife | — | Massachusetts |
| 63 | Arthur J. Wills | 24 | Son | Spool Making | Massachusetts |
| 64 | Ida M. Wagner | 75 | Head | — | Germany |
| 65 | Ashod Pahigian | 34 | Head | Photo Engraver | Armenia |
| 66 | Pilo Pahigian | 33 | Wife | — | Massachusetts |
| 67 | Lazarus A. Pahigian | 8 | Son | — | Massachusetts |
| 68 | Arshalous Pahigian | 50 | Mother | — | Armenia |
| 69 | Sally Pahigian | 22 | Sister | Stenographer | Massachusetts |
| 71 | Oscar J. Starke | 64 | Head | Proprietor | Germany |
| 72 | Robert J. Starke | 33 | Son | Proprietor | Massachusetts |
| 73 | Margaret M. Starke | 25 | Daughter | Secretary | Massachusetts |
| 74 | Genevieve Sullivan | 34 | Head | Teacher | Massachusetts |
| 75 | Esther F. Sullivan | 31 | Sister | — | Massachusetts |
| 76 | Robert C. Watson | 37 | Head | Bartender | Massachusetts |
| 77 | Mary E. Watson | 38 | Wife | — | Massachusetts |
| 78 | Ellen J. Watson | 5 | Daughter | — | Massachusetts |
| 79 | Kenneth P. Doane | 45 | Head | Paper Maker | Canada |
| 80 | Ruth S. Doane | 37 | Wife | — | 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)