Mary Duffy — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Suffolk-County, Massachusetts

Our Model Tree links this Mary Duffy across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 4-person household.

Age 59 b. ~1881 Female Head Born: Ireland Widowed

1940 Census Record Details

Census Year	1940
Location	Suffolk-County, Massachusetts
Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	59
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Boston
1935 Residence (County)	Suffolk
Naturalization Status	Naturalized
Additional Details
Occupation	Scrubwoman
Industry	Buildings
Class of Worker	PW
Hours Worked	25
Income (1939)	500
Highest Grade	No 5
1935 Residence	Same House
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	Scrubwoman
Township / Ward	Boston
Est. Birth Year	~1881

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.

4 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Duffy	Daughter	—	32	~1908
Margaret Duffy	Daughter	—	21	~1919
Mary Duffy	Head	—	59	~1881
Edward Duffy	Son	—	24	~1916

Census Appearances

1920

Suffolk, Massachusetts

Other, age 33

Suffolk, Massachusetts · implied b. ~1887 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	Mary
Relationship to Head	Servant
Sex	F
Color / Race	White
Age	33
Marital Status	Single
Birthplace	Ireland
Year of Immigration	1897
Naturalization Status	Alien
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Maid
Industry	Private family
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Suffolk, Massachusetts

Head, age 44

Suffolk, Massachusetts · implied b. ~1886 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	44
Marital Status	Widowed
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1897
Age at First Marriage	18
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Mother Tongue	English
Home Owned/Rented	R
Home Value / Rent	28.00
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Suffolk-County, Massachusetts

Head, age 59

Suffolk-County, Massachusetts · implied b. ~1881 — 4 household members

Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	59
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Boston
1935 Residence (County)	Suffolk
Naturalization Status	Naturalized
Occupation	Scrubwoman
Industry	Buildings
Class of Worker	PW
Hours Worked	25
Income (1939)	500
Highest Grade	No 5
1935 Residence	Same House
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Duffy

Head · 1940 · age 59 · b. ~1881 · Massachusetts

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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

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01657-00211)

Line	Name	Age	Relation	Occupation	Birthplace
1	Cornelius Donohue	60	son	Foreman	Mass
2	Joseph S Donohue	49	son	Clerk	Mass
3	Catherine Donohue	46	daughter	—	Mass
4	Mccarthy Ellen Donohue	71	Cousin	Book Binder	New York
5	George Thompson	44	Head	Custodian	Mass
6	Delia G Thompson	44	Wife	—	Mass
7	Dorothy B Thompson	17	daughter	—	Mass
8	Robert F Thompson	16	son	—	Mass
9	John J Thompson	12	son	—	Mass
10	Angelo Dini	54	Head	Waiter	Italy
11	Julia Dini	46	Wife	Machine Oper	Italy
12	William O'Keefe	45	Head	Manager	Mass
13	Irene F O'Keefe	45	Wife	—	Mass
14	Evelyn R O'Keefe	21	daughter	Book Inspector	Mass
15	Evelyn E Chase	38	Sister	Forelady	Mass
16	Pauline Dunn	37	Sister	Inspector	Mass
17	John Sr. Goggin	32	Head	Printer	Mass
18	Margaret Goggin	24	Wife	—	Mass
19	John Jr Goggin	3	son	—	Mass
20	Mary A O'Brien	52	B Law	Nutrition Att.	Mass
21	George Mcrae	32	Head	Paymaster	Mass
22	Margaret Mcrae	32	Wife	—	New York
23	Helen Mcrae	10	daughter	—	Mass
24	Margaret Mcrae	6	daughter	—	Mass
25	Joseph Cavaliere	45	Head	Sole Layer	Italy
26	Elizabeth Cavaliere	45	Wife	—	Italy
27	Carmela Cavaliere	22	daughter	Winder	Mass
28	Mary Cavaliere	20	daughter	Window	Mass
29	Anna Cavaliere	18	daughter	—	Mass
30	Joseph Cavaliere	15	son	—	Mass
31	Elizabeth Cavaliere	13	daughter	—	Mass
32	Florence Cavaliere	10	daughter	—	Mass
33	Eleanor Cavaliere	7	daughter	—	Mass
34	Mary Duffy THIS PERSON	59	Head	Scrubwoman	Ireland
35	Edward Duffy	24	son	Folder	Mass
36	Margaret Duffy	21	daughter	Winder	England
37	Mary Duffy	32	daughter	Clerk	Mass
38	Edwin J. Thornton	45	Head	Foreman	Mass
39	Margaret R Thornton	39	Wife	Floor Hand	Mass
40	Edwin J. Jr Thornton	18	son	—	Mass

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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)

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