Mary Duffy — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Hudson-County, New Jersey

Our Model Tree links this Mary Duffy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 3-person household.

Age 65 b. ~1875 Female Head Born: Ireland Widowed

1940 Census Record Details

Census Year	1940
Location	Hudson-County, New Jersey
Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	65
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Jersey City
1935 Residence (County)	Hudson
Naturalization Status	Naturalized
Additional Details
Hours Worked	0
Highest Grade	H 8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland
Township / Ward	Jersey City
Est. Birth Year	~1875

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Kay Duffy	Daughter	—	24	~1916
Mary Duffy	Head	—	65	~1875
Hugh Duffy	Son	—	39	~1901

Census Appearances

1920

Hudson, New …

Head, age 45

Hudson, New Jersey · implied b. ~1875 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	45
Marital Status	Widowed
Birthplace	Ireland
Year of Immigration	1890
Naturalization Status	Naturalized
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Home Owned/Rented	R
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Hudson, New …

Head, age 56

Hudson, New Jersey · implied b. ~1874 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	56
Marital Status	Widowed
Birthplace	Ireland
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	18
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Hudson-County, New …

Head, age 65

Hudson-County, New Jersey · implied b. ~1875 — 3 household members

Surname	Duffy
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	65
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Jersey City
1935 Residence (County)	Hudson
Naturalization Status	Naturalized
Hours Worked	0
Highest Grade	H 8
1935 Residence	Same place
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 65 · b. ~1875 · New Jersey

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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 — Hudson-County, New Jersey Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02408-00533)

Line	Name	Age	Relation	Occupation	Birthplace
1	Mary Duffy THIS PERSON	65	Head	—	Ireland
2	Hugh Duffy	39	Son	Policeman	N J
3	Kay Duffy	24	Daughter	Typist	N J
4	Thomas O'Malley	48	Head	Chauffeur	N J
5	Margaret O'Malley	45	Wife	—	N J
6	John Ward	48	Lodger	—	N J
7	John Murphy	51	Head	Chauffeur	N J
8	Nora Murphy	42	Wife	—	N J
9	John Murphy	15	Son	—	N J
10	Loraine Murphy	8	Daughter	—	N J
11	Winifred Murphy	6	Daughter	—	N J
12	William Bremner	53	Lodger	Inspector	N J
13	Thomas Meseck	47	Head	Work Hand	N J
14	Elsie Meseck	47	Wife	—	N J
15	Eugene Meseck	13	Son	—	N J
16	Andrew Nash	47	Head	Clerk	New York
17	Alfred Nash	22	Son	Clerk	N J
18	Robert Nash	19	Son	New Worker	N J
19	Elizabeth Nash	16	Daughter	—	N J
20	Jane Guerin	51	Sister	Freelady	New York
21	Ivor Hortree	54	Head	Handy Man	England
22	Emma Hortree	42	Wife	—	N J
23	Violet Hortree	26	Daughter	—	N J
24	Marion Hortree	9	Daughter	—	N J
25	Gilbert Hortree	6	Son	—	N J
26	Charles Robinson	53	Head	Watchman	New York
27	Viola Robinson	45	Wife	—	New York
28	Anna Robinson	14	Daughter	—	N J
29	Betty Robinson	12	Daughter	—	N J
30	Morris Robinson	8	Son	—	N J
31	John Campbell	40	Lodger	Laborer	N J
32	Frank Gill	52	Head	Clerk	N J
33	Catherine Gill	45	Wife	—	Penn
34	Charles R. Gill	11	Son	—	N J
35	James E. Curtis	25	Lodger	—	N J
36	Edward Curtis	55	Lodger	—	N J
37	Henry Curtis	35	Lodger	—	N J
38	Richard Ernst	31	Head	Supervisor	N J
39	Catherine Ernst	26	Wife	—	Penn
40	Chatrum Ernst	3	Daughter	—	N J

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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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