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Thomas Duffy — 1940 US Census Record

Model Tree available

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

Our Model Tree links this Thomas Duffy across the 1920, 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1913), then head of a 13-person household.

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

1940 Census Record Details

Census Year1940
LocationErie-County, New York
SurnameDuffy
Given NameThomas
Relationship to HeadSon
SexM
Color / RaceWhite
Age27
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Buffalo City
1935 Residence (County)Erie
Additional Details
OccupationElectrician
IndustryBoard of Education
Class of WorkerPW
Hours Worked40
Income (1939)1040
Highest GradeNo 8
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationElectrician
Township / WardBuffalo City
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.

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

Name Relation to head Relative to Thomas Age Birth yr
Eleanor Duffy Daughter — 19 ~1921
Patricia Duffy Daughter — 22 ~1918
Dorothy Duffy Daughter — 26 ~1914
Daniel Duffy Son — 5 ~1935
John Duffy Son — 21 ~1919
Thomas Duffy Son — 27 ~1913
Cecelia Duffy Daughter — 11 ~1929
William Duffy Son — 14 ~1926
Theresa Duffy Daughter — 8 ~1932
Christopher Duffy Other — 58 ~1882
Rita Duffy Daughter — 23 ~1917
Laura Duffy Head — 48 ~1892
Rose Duffy Daughter — 13 ~1927

Census Appearances

1920
Erie, New …
Son, age 7
Erie, New York · implied b. ~1913 — 9 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name Thomas F.
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 Pennsylvania
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Erie, New …
Son, age 17
Erie, New York · implied b. ~1913 — 13 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Duffy
Given Name Thomas J
Relationship to Head son
Sex M
Color / Race White
Age 17
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace Pennsylvania
Occupation none
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Erie-County, New …
Son, age 27
Erie-County, New York · implied b. ~1913 — 13 household members
Surname Duffy
Given Name Thomas
Relationship to Head Son
Sex M
Color / Race White
Age 27
Marital Status Single
Birthplace New York
1935 Residence (City) Buffalo City
1935 Residence (County) Erie
Occupation Electrician
Industry Board of Education
Class of Worker PW
Hours Worked 40
Income (1939) 1040
Highest Grade No 8
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.
Model Tree available
Our Model Tree links Thomas 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 Laura Duffy (~0.92 confidence) and mother Laura Duffy (~0.92 confidence) and mother Laura Duffy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
Thomas Duffy
b. ~1878
Source father
● Household · direct · ~0.92
Father
Thomas Duffy
b. ~1880
Source father
● Household · direct · ~0.92
Mother
Laura Duffy
b. ~1892
Source mother
● Household · direct · ~0.92
Mother
Laura Duffy
b. ~1892
Source mother
● Household · direct · ~0.92
Mother
Laura Duffy
b. ~1887
Source mother
● Household · direct · ~0.92
This person
Anchor record
Thomas Duffy
Son · 1940 · age 27 · b. ~1913 · New York
★ You are viewing this record
Sibling
Rita Duffy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Duffy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duffy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecelia Duffy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Duffy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Duffy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Duffy
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Duffy
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Duffy
Sibling · 1940 · age 5
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 — Erie-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02823-00117)

Line Name Age Relation Occupation Birthplace
41 Edith Baron 51 Head Charwoman Hungary
42 Betty Baron 30 Daughter Clerk New York
43 Patrick Keane 55 Head Foreman Ireland
44 Catherine Keane 54 Wife — New York
45 Mary Keane 21 Daughter New Worker New York
46 Catherine Keane 18 Daughter — New York
47 Thomas Keane 13 Son — New York
48 William Roche 29 Head Sheer Helper New York
49 Marian Roche 23 Wife — New York
50 William Roche 2 Son — New York
51 Paul Roche 1 Son — New York
52 John Carr 53 Head Weigher New York
53 Loretta Carr 51 Wife — New York
54 Francis Carr 22 Son Tallyer New York
55 Luke Carr 17 Son — New York
56 James Carr 14 Son — New York
57 Margaret Carr 13 Daughter — New York
58 Gerald Carr 12 Son — New York
59 Lillian Carr 10 Daughter — New York
60 Laura Duffy 48 Head Assembler Penna
61 Thomas Duffy THIS PERSON 27 Son Electrician New York
62 Dorothy Duffy 26 Daughter New Worker New York
63 Rita Duffy 23 Daughter Machine Operator New York
64 Patricia Duffy 22 Daughter Machine Operator New York
65 John Duffy 21 Son Stock Boy New York
66 Eleanor Duffy 19 Daughter New Worker New York
67 William Duffy 14 Son — New York
68 Rose Marie Duffy 13 Daughter — New York
69 Cecelia Duffy 11 Daughter — New York
70 Theresa Duffy 8 Daughter — New York
71 Daniel Duffy 5 Son — New York
72 Christopher Duffy 58 Brother Laborer New York
73 John Stefanick 29 Head Truck Driver New York
74 Helen Stefanick 29 Wife — New York
75 John Stefanick 7 Son — New York
76 Rose Mary Stefanick 4 Daughter — New York
77 Betty Lou Stefanick 2 Daughter — New York
78 Elizabeth Liejmark 56 Head — Poland
79 — None — — —
80 — None — — —

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Pedigree Summary

Thomas + 10 siblings
Gen 1 · 5 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)

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