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Mary Duffy — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · New York, New York

Our Model Tree links this Mary Duffy across the 1930 and 1940 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 18-person household.

Age 48 b. ~1882 Female Spouse Born: Ireland Married

1930 Census Record Details

Census Year1930
LocationNew York, New York
SurnameDuffy
Given NameMary
Relationship to HeadWife
SexF
Color / RaceWhite
Age48
Marital StatusMarried
BirthplaceIreland
Naturalization StatusNaturalized
Year of Immigration1901
Age at First Marriage21
Father's BirthplaceIreland
Mother's BirthplaceIreland
Additional Details
Can Read/WriteYes
Mother TongueIrish
Birth CountryIreland
Birthplace (normalized)ireland
Township / WardNew York City
Est. Birth Year~1882

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.

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

Name Relation to head Relative to Mary Age Birth yr
Elizabeth Duffy Daughter — 10 ~1920
Alice Duffy Daughter — 18 ~1912
Catherine Duffy Daughter — 20 ~1910
Grace Duffy Daughter — 8 ~1922
Mary Duffy Daughter — 22 ~1908
Margaret Duffy Daughter — 2 ~1928
Helen Duffy Daughter — 14 ~1916
James Duffy Head — 48 ~1882
Edward Duffy Son — 4 ~1926
Thomas Duffy Son — 16 ~1914
William Duffy Son — ~1930
Francis Duffy Son — 6 ~1924
John Duffy Son — 24 ~1906
Joseph Duffy Son — 12 ~1918
John Duffy Son — ~1930
James Duffy Son — 26 ~1904
Robert Duffy Son — 1 ~1929
Mary Duffy Spouse — 48 ~1882

Census Appearances

1930
New York, …
Spouse, age 48
New York, New York · implied b. ~1882 — 18 household members
Surname Duffy
Given Name Mary
Relationship to Head Wife
Sex F
Color / Race White
Age 48
Marital Status Married
Birthplace Ireland
Naturalization Status Naturalized
Year of Immigration 1901
Age at First Marriage 21
Father's Birthplace Ireland
Mother's Birthplace Ireland
Can Read/Write Yes
Mother Tongue Irish
Birth Country Ireland
Birthplace (normalized) ireland
1940
New-York-County, New …
Spouse, age 57
New-York-County, New York · implied b. ~1883 — 2 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name Margaret
Relationship to Head Wife
Sex F
Color / Race White
Age 57
Marital Status Married
Birthplace Ireland
1935 Residence (City) New York City
1935 Residence (County) New York
Naturalization Status Naturalized
Highest Grade No 8
1935 Residence Same place
Birth Country Ireland
Birthplace (normalized) ireland

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
Spouse · 1930 · age 48 · b. ~1882 · New York
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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — New York, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:californiacensus00reel209:0892)

Line Name Age Relation Occupation Birthplace
51 — None — — —
52 — None — — —
53 — None — — —
54 — None — — —
55 — None — — —
56 — None — — —
57 — None — — —
58 — None — — —
59 — None — — —
60 — None — — —
61 — None — — —
62 — None — — —
63 John Kelly 62 Head Laborer Ireland
64 Mary Kelly 61 Wife — Ireland
65 John J Kelly 31 Son Laborer New York
66 Anna Kelly 24 Daughter — New York
67 Thomas Kelly 22 Son Laborer New York
68 James Duffy 48 Head Laborer Ireland
69 Mary Duffy THIS PERSON 48 Wife — Ireland
70 James Duffy 26 Son Laborer New York
71 John Duffy 24 Son Laborer New York
72 Mary Duffy 22 Daughter — New York
73 Catherine Duffy 20 Daughter — New York
74 Alice Duffy 18 Daughter — New York
75 Thomas Duffy 16 Son — New York
76 Helen Duffy 14 Daughter — New York
77 Joseph Duffy 12 Son — New York
78 Elizabeth Duffy 10 Daughter — New York
79 Grace Duffy 8 Daughter — New York
80 Francis Duffy 6 Son — New York
81 Edward Duffy 4 Son — New York
82 Margaret Duffy 2 Daughter — New York
83 Robert Duffy 1 Son — New York
84 William Duffy 0 Son — New York
85 John Duffy 0 Son — New York
86 John Westphal 49 Head Laborer Germany
87 Mary Westphal 47 Wife — Germany
88 John Westphal 21 Son Laborer New York
89 Mary Westphal 19 Daughter — New York
90 Anna Westphal 17 Daughter — New York
91 Catherine Westphal 15 Daughter — New York
92 Elizabeth Westphal 13 Daughter — New York
93 John Schultz 31 Head Laborer Germany
94 Mary Schultz 29 Wife — Germany
95 John Schultz 4 Son — New York
96 Mary Schultz 2 Daughter — New York
97 Anna Schultz 0 Daughter — New York
98 Catherine Schultz 0 Daughter — New York
99 Elizabeth Schultz 0 Daughter — New York
100 Francis Schultz 0 Son — New York

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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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