YourRoots by Genomelink
Sign up free
JD

James Duffy — 1940 US Census Record

Model Tree available

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

Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1913), then head of a 5-person household.

Age 27 b. ~1913 Male Son Born: New York Single

1940 Census Record Details

Census Year1940
LocationWestchester-County, New York
SurnameDuffy
Given NameJames
Relationship to HeadSon
SexM
Color / RaceWhite
Age27
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Yonkers
1935 Residence (County)Westchester
Additional Details
OccupationClerk
IndustryBrokerage house
Class of WorkerPW
Hours Worked38
Income (1939)1144
Highest GradeC-4
1935 ResidenceSame house
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationClerk
Township / WardYonkers
Est. Birth Year~1913

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.

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

Name Relation to head Relative to James Age Birth yr
Thomas Duffy Head — 61 ~1879
James Duffy Son — 27 ~1913
Francis Duffy Son — 19 ~1921
Edward Duffy Son — 24 ~1916
Johanna Duffy Spouse — 60 ~1880

Census Appearances

1920
Kings, New …
Son, age 6
Kings, New York · implied b. ~1914 — 13 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name James
Relationship to Head Son
Sex M
Color / Race White
Age 6
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace Ireland
Can Read Yes
Can Write Yes
Speaks English Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Kings, New …
Son, age 17
Kings, New York · implied b. ~1913 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name James
Relationship to Head Son
Sex M
Color / Race White
Age 17
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace Ireland
Occupation Clerk
Industry Office
Class of Worker W
Can Read/Write Yes
Mother Tongue English
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Westchester-County, New …
Son, age 27
Westchester-County, New York · implied b. ~1913 — 5 household members
Surname Duffy
Given Name James
Relationship to Head Son
Sex M
Color / Race White
Age 27
Marital Status Single
Birthplace New York
1935 Residence (City) Yonkers
1935 Residence (County) Westchester
Occupation Clerk
Industry Brokerage house
Class of Worker PW
Hours Worked 38
Income (1939) 1144
Highest Grade C-4
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.
Model Tree available
Our Model Tree links James Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Duffy (~0.92 confidence) and father Thomas Duffy (~0.92 confidence) and mother Bridget Duffy (~0.92 confidence) and mother Johanna Duffy (~0.92 confidence) and father Martin Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
Thomas Duffy
b. ~1873
Source father
● Household · direct · ~0.92
Father
Thomas Duffy
b. ~1879
Source father
● Household · direct · ~0.92
Mother
Bridget Duffy
b. ~1880
Source mother
● Household · direct · ~0.92
Mother
Johanna Duffy
b. ~1880
Source mother
● Household · direct · ~0.92
Father
Martin Duffy
b. ~1883
Source father
● Household · direct · ~0.92
Mother
Mary Duffy
b. ~1891
Source mother
● Household · direct · ~0.92
This person
Anchor record
James Duffy
Son · 1940 · age 27 · b. ~1913 · New York
★ You are viewing this record
Sibling
Francis Duffy
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Duffy
Sibling · 1940 · age 24
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 — Westchester-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02866-00256)

Line Name Age Relation Occupation Birthplace
41 Mary King 71 Mother — New York
42 John King 43 Brother Landscaping New York
43 Sullivan H. Jackson 51 Head Money Estimator New York
44 Thomas Jackson 14 Son — New York
45 Barbara Jackson 13 Daughter — New York
46 John Malcomson 31 Head Auto Mechanic New York
47 Henrietta Malcomson 24 Wife — New York
48 Kathleen Malcomson 0 Daughter — New York
49 Thomas Duffy 61 Head Bricklayer Irish Free State
50 Johanna Duffy 60 Wife — Irish Free State
51 James Duffy THIS PERSON 27 Son Clerk New York
52 Edward Duffy 24 Son Clerk (Account) New York
53 Francis Duffy 19 Son — New York
54 Lawrence Brady 60 Head Operator Sheet Metal Worker New Jersey
55 Della Brady 54 Wife — Irish Free State
56 Catherine A. Brady 22 Daughter Stenographer New York
57 Marion A. Brady 15 Daughter — New York
58 Halter Galt 76 Head Meat Salesman Scotland
59 Eliza Galt 77 Wife — Scotland
60 Hanna Conway 51 Head — Irish Free State
61 John Conway 29 Son Credit Clerk New Jersey
62 Helen Cunningham 66 Head — England
63 Hannes Gabrieleen 48 Head — Norway
64 May Gabrieleen 26 Daughter Clerk New York
65 David Gabrieleen 23 Son Artist New York
66 Guerene Olsen 90 Mother — Norway
67 Frank Mazzeo 51 Head Proprietor Barber Italy
68 Rose Mazzeo 45 Wife Machine Operator New York
69 Joseph Mazzeo 22 Son Electrician New York
70 Frederick Hecht 70 Head — Germany
71 Dora Hecht 73 Wife — Germany
72 Edward S. Mccarthy 34 Head Salesman New York
73 Lillian E. Mccarthy 33 Wife — New York
74 Edward S. Jr. Mccarthy 1 Son — New York
75 Edward Reilly 39 Head Elevator Operator New York
76 Agnes Reilly 40 Wife — New York
77 Robert Reilly 17 Son — New York
78 Dorothy Reilly 14 Daughter — New York
79 Bernard Raskin 33 Head Truck Driver New York
80 Catherine Raskin 26 Wife — New York

Search for James Duffy

All James Duffy Census Records Discover Duffy Family Tree

Pedigree Summary

James + 2 siblings
Gen 1 · 6 parents ~0.92
Max depth 4 (1900–1950 window)

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)

Report inaccurate data
👤 View Profile 🌳 Ancestors 👥 Descendants