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William Duffy — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Richmond-County, New York

Our Model Tree links this William Duffy across the 1930 and 1940 US Censuses in Richmond-County, New York (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.

Age 17 b. ~1923 Male Son Born: New York Single

1940 Census Record Details

Census Year1940
LocationRichmond-County, New York
SurnameDuffy
Given NameWilliam
Relationship to HeadSon
SexM
Color / RaceWhite
Age17
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Richmond
1935 Residence (County)Richmond
Additional Details
Class of WorkerNo
Highest GradeH-2
1935 ResidenceSame House
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Est. Birth Year~1923

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.

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

Name Relation to head Relative to William Age Birth yr
Florence Duffy Daughter — 26 ~1914
John Duffy Son — 22 ~1918
Robert Duffy Son — 14 ~1926
Gertrude Duffy Daughter — 19 ~1921
John Duffy Head — 50 ~1890
Margaret Duffy Spouse — 47 ~1893
James Duffy Son — 9 ~1931
William Duffy Son — 17 ~1923

Census Appearances

1930
Richmond, New …
Son, age 7
Richmond, New York · implied b. ~1923 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 7
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Richmond-County, New …
Son, age 17
Richmond-County, New York · implied b. ~1923 — 8 household members
Surname Duffy
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 17
Marital Status Single
Birthplace New York
1935 Residence (City) Richmond
1935 Residence (County) Richmond
Class of Worker No
Highest Grade H-2
1935 Residence Same House
Birth State New York
Birth Country United States
Birthplace (normalized) new york

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 William Duffy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Duffy
Son · 1940 · age 17 · b. ~1923 · New York
★ You are viewing this record
Sibling
Florence Duffy
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Duffy
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Duffy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Duffy
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1940 · age 22
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 — Richmond-County, New York Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-02761-00851)

Line Name Age Relation Occupation Birthplace
41 Rosemary Kelly 5 Daughter — New York
42 Matthew J. Campbell 40 Head Insurance Clerk New York
43 Ethel M. Campbell 40 Wife — New York
44 Matthew J. Jr. Campbell 17 Son — New Jersey
45 Eileen A. Campbell 15 Daughter — New York
46 Ann Campbell 12 Daughter — New York
47 Jean Campbell 8 Daughter — New York
48 Cyril F. Julian 31 Head Medical Doctor New York
49 Marjorie Julian 29 Wife — Illinois
50 Eugene A. Delaney 37 Head Electrician Helper New York
51 Marie F. Delaney 37 Wife Payroll Clerk New York
52 Eugene A. Jr. Delaney 11 Son — New York
53 Paul Delaney 8 Son — New York
54 Matthew L. Forney 67 Father-in-law Contract Clerk New York
55 John Duffy 50 Head Iron Worker New York
56 Margaret Duffy 47 Wife — New York
57 Florence Duffy 26 Daughter Bookkeeper New York
58 John H. Duffy 22 Son Agency Clerk New York
59 Gertrude Duffy 19 Daughter Beauty Attendant New York
60 William Duffy THIS PERSON 17 Son — New York
61 Robert Duffy 14 Son — New York
62 James Duffy 9 Son — New York
64 George Connolly 35 Head Maintenance Mechanic New York
65 Lillian Connolly 32 Wife — New York
66 George H. Connolly 14 Son — New York
67 Jane Connolly 3 Daughter — New York
68 Louise Lewis 67 Head — Norway
69 May H. Lewis 42 Daughter Secretary New York
70 John A. Styer 56 Head Marine Engineer Sweden
71 Alice Styer 53 Wife — New York
72 Emil Senatore 47 Head Salesman New Jersey
73 Jean Senatore 45 Wife — New Jersey
74 Matilda Schilling 78 Head — Finland
75 Martha Schilling 37 Daughter Stenographer New Jersey
76 Florence Schilling 36 Daughter Telephone Operator New Jersey
77 Richard Gill 13 Grandson — Ohio
78 Joseph Milasch 55 Head Asst. Foreman New York
79 Mae S. Milasch 46 Wife — New Jersey
80 Leonard J. Milasch 18 Son — New York

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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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