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Mary Duffy — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Hudson, New Jersey

Our Model Tree links this Mary Duffy across the 1930 and 1940 US Censuses in Hudson, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1910), then head of a 14-person household.

Age 20 b. ~1910 Female Daughter Born: New Jersey Single

1930 Census Record Details

Census Year1930
LocationHudson, New Jersey
SurnameDuffy
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age20
Marital StatusSingle
BirthplaceNew Jersey
Father's BirthplaceNew Jersey
Mother's BirthplaceNew Jersey
Additional Details
OccupationClerk
IndustryDept Store
Class of WorkerW
Can Read/WriteYes
Birth StateNew Jersey
Birth CountryUnited States
Birthplace (normalized)new jersey
OccupationClerk
Township / WardJersey City
Est. Birth Year~1910

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.

14 people recorded at the same address in the 1930 census.

Name Relation to head Relative to Mary Age Birth yr
Dorothy Duffy Daughter — 10 ~1920
Mary Duffy Daughter — 20 ~1910
Anna Duffy Daughter — ~1930
Helen Duffy Daughter — 12 ~1918
Margaret Duffy Daughter — 2 ~1928
John Duffy Head — 50 ~1880
James Duffy Son — 16 ~1914
William Duffy Son — 8 ~1922
Robert Duffy Son — 14 ~1916
John Duffy Son — 22 ~1908
Edward Duffy Son — 4 ~1926
Thomas Duffy Son — 18 ~1912
Richard Duffy Son — 6 ~1924
Mary Duffy Spouse — 48 ~1882

Census Appearances

1930
Hudson, New …
Daughter, age 20
Hudson, New Jersey · implied b. ~1910 — 14 household members
Surname Duffy
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 20
Marital Status Single
Birthplace New Jersey
Father's Birthplace New Jersey
Mother's Birthplace New Jersey
Occupation Clerk
Industry Dept Store
Class of Worker W
Can Read/Write Yes
Birth State New Jersey
Birth Country United States
Birthplace (normalized) new jersey
1940
Hudson-County, New …
Spouse, age 31
Hudson-County, New Jersey · implied b. ~1909 — 2 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffie
Given Name Mary E.
Relationship to Head Wife
Sex F
Color / Race White
Age 31
Marital Status Married
Birthplace New Jersey
1935 Residence (City) Jersey City
1935 Residence (County) Hudson
Occupation Packer
Industry Bakery Prod.
Class of Worker PW
Hours Worked 26
Income (1939) 1070
Highest Grade H 4
1935 Residence Same place
Birth State New Jersey
Birth Country United States
Birthplace (normalized) new jersey

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.
Linked across censuses
Our Model Tree links Mary Duffy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Duffy
Daughter · 1930 · age 20 · b. ~1910 · New Jersey
★ You are viewing this record
Sibling
Helen Duffy
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Duffy
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Duffy
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Duffy
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Duffy
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Duffy
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duffy
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Duffy
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Duffy
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Duffy
Sibling · 1930 · age 18
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

1930 US Federal Census — Hudson, New Jersey Open full size

Page Contents

50 people indexed on this census page (ia:1930:newjerseycensus00reel1356:0970)

Line Name Age Relation Occupation Birthplace
51 William Snyder 42 Head Laborer New Jersey
52 Anna Snyder 40 Wife — New Jersey
53 William Jr Snyder 18 Son Laborer New Jersey
54 Margaret Snyder 16 Daughter Clerk New Jersey
55 John Snyder 14 Son — New Jersey
56 Robert Snyder 12 Son — New Jersey
57 Dorothy Snyder 10 Daughter — New Jersey
58 Helen Snyder 8 Daughter — New Jersey
59 Thomas Snyder 6 Son — New Jersey
60 James Snyder 4 Son — New Jersey
61 Richard Snyder 2 Son — New Jersey
62 Edward Snyder 0 Son — New Jersey
63 William Close 45 Head Laborer New Jersey
64 Mary Close 42 Wife — New Jersey
65 William Jr Close 18 Son Laborer New Jersey
66 John Close 16 Son Laborer New Jersey
67 Robert Close 14 Son — New Jersey
68 Dorothy Close 12 Daughter — New Jersey
69 Helen Close 10 Daughter — New Jersey
70 Thomas Close 8 Son — New Jersey
71 James Close 6 Son — New Jersey
72 Richard Close 4 Son — New Jersey
73 Edward Close 2 Son — New Jersey
74 Margaret Close 0 Daughter — New Jersey
75 John Duffy 50 Head Laborer New Jersey
76 Mary Duffy 48 Wife — New Jersey
77 John Jr Duffy 22 Son Laborer New Jersey
78 Mary Duffy THIS PERSON 20 Daughter Clerk New Jersey
79 Thomas Duffy 18 Son Laborer New Jersey
80 James Duffy 16 Son Laborer New Jersey
81 Robert Duffy 14 Son — New Jersey
82 Helen Duffy 12 Daughter — New Jersey
83 Dorothy Duffy 10 Daughter — New Jersey
84 William Duffy 8 Son — New Jersey
85 Richard Duffy 6 Son — New Jersey
86 Edward Duffy 4 Son — New Jersey
87 Margaret Duffy 2 Daughter — New Jersey
88 Anna Duffy 0 Daughter — New Jersey
89 Thomas Kelly 45 Head Laborer New Jersey
90 Mary Kelly 42 Wife — New Jersey
91 Thomas Jr Kelly 18 Son Laborer New Jersey
92 John Kelly 16 Son Laborer New Jersey
93 Mary Kelly 14 Daughter — New Jersey
94 Helen Kelly 12 Daughter — New Jersey
95 James Kelly 10 Son — New Jersey
96 Robert Kelly 8 Son — New Jersey
97 Dorothy Kelly 6 Daughter — New Jersey
98 William Kelly 4 Son — New Jersey
99 Richard Kelly 2 Son — New Jersey
100 Edward Kelly 0 Son — New Jersey

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1930 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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