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William Duffy — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this William Duffy across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 6-person household.

Age 12 b. ~1928 Male Son Born: New York Single

1940 Census Record Details

Census Year1940
LocationKings-County, New York
SurnameDuffy
Given NameWilliam
Relationship to Headson
SexM
Color / RaceWhite
Age12
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)New York City
1935 Residence (County)Kings
Additional Details
Highest Grade7
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardNew York City
Est. Birth Year~1928

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.

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

Name Relation to head Relative to William Age Birth yr
Charles Duffy Head — 45 ~1895
Elizabeth Duffy Spouse — 32 ~1908
Maury Duffy Daughter — 15 ~1925
William Duffy Son — 12 ~1928
Charles Duffy Son — 14 ~1926
Patrick Duffy Son — 4 ~1936

Census Appearances

1930
Kings, New …
Son, age 2
Kings, New York · implied b. ~1928 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 2
Marital Status Single
Birthplace New York
Father's Birthplace Northern Ireland
Mother's Birthplace Northern Ireland
Can Read/Write No
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Kings-County, New …
Son, age 12
Kings-County, New York · implied b. ~1928 — 6 household members
Surname Duffy
Given Name William
Relationship to Head son
Sex M
Color / Race White
Age 12
Marital Status Single
Birthplace New York
1935 Residence (City) New York City
1935 Residence (County) Kings
Highest Grade 7
1935 Residence Same place
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 12 · b. ~1928 · New York
★ You are viewing this record
Sibling
Maury Duffy
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Duffy
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Duffy
Sibling · 1940 · age 14
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 — Kings-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02612-00453)

Line Name Age Relation Occupation Birthplace
1 — 16 daughter — New York
2 Angelina 12 daughter — New York
3 Louis Vanderbeek 49 Head Organizer New York
4 Helen Vanderbeek 47 Wife — New York
5 Peter Vanderbeek 81 Father — New York
6 Fred Des Rosiers 43 Head Cooper New York
7 Grace Des Rosiers 39 Wife Clerk New York
8 James Halloran 37 Head — Ireland
9 Allen Halloran 26 Wife Train Man Ireland
10 Eleanor Halloran 3 daughter — New York
11 Charles Duffy 45 Head Plumber Ireland
12 Elizabeth Duffy 32 Wife — Ireland
13 Maury Duffy 15 daughter — New York
14 Charles Jr. Duffy 14 son — New York
15 William Duffy THIS PERSON 12 son — New York
16 Patrick Duffy 4 son — New York
17 George Blockell 62 Head Patrolman New York
18 Ida Blockell 62 Wife — New York
19 Dorothy Garisema 34 daughter New Worker New York
20 Viola Garisema 13 grand daughter — New York
21 Eleanor Bear 26 daughter New Worker New York
22 Gilbert Bear 5 grandson — New York
23 Patrick Colgan 62 Head Sales Man New York
24 Mary Colgan 50 Wife — New York
25 Edward Colgan 31 son Clerk New York
26 Patrick Jr. Colgan 24 son Ball Player New York
27 William Repantini 36 Head Investigator New York
28 Helen Repantini 34 Wife — New York
29 June Ann Repantini 7 daughter — New York
30 May Jeanette Repantini 5 daughter — New York
31 Helen Elizabeth Repantini 3 daughter — New York
32 Carole Repantini 1 daughter — New York
33 James Fraser 32 Head Trader New York
34 Zora Fraser 31 Wife — New York
35 James Gordon Fraser 2 son — New York
36 Donald Allen 30 Head Repairman New York
37 Margaret Allen 26 Wife — New York
38 Kenneth Allen 2 son — New York
39 Louise Shilling 52 Head — Germany
40 Arthur Lih 36 Head Fireman Norway

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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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