William Cassidy — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this William Cassidy across the 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 5-person household.

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

1940 Census Record Details

Census Year	1940
Location	Bronx-County, New York
Surname	Cassidy
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
1935 Residence (County)	Bronx
Additional Details
Highest Grade	No 6
1935 Residence	Same house
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Township / Ward	New York
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.

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

Name	Relation to head	Relative to William	Age	Birth yr
Mary Cassidy	Daughter	—	17	~1923
Arthur Cassidy	Son	—	15	~1925
William Cassidy	Son	—	12	~1928
Elizabeth Cassidy	Spouse	—	43	~1897
William Cassidy	Head	—	55	~1885

Census Appearances

1930

New York, …

Other, age 2

New York, New York · implied b. ~1928 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cassidy
Given Name	William
Relationship to Head	Nephew
Sex	M
Color / Race	White
Age	2
Marital Status	Single
Birthplace	New York
Father's Birthplace	N. York
Mother's Birthplace	N. York
Occupation	none
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Bronx-County, New …

Son, age 12

Bronx-County, New York · implied b. ~1928 — 5 household members

Surname	Cassidy
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
1935 Residence (County)	Bronx
Highest Grade	No 6
1935 Residence	Same house
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

Our Model Tree links William Cassidy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

William Cassidy

Son · 1940 · age 12 · b. ~1928 · New York

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Sibling

Arthur Cassidy

Sibling · 1940 · age 15

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Mary Cassidy

Sibling · 1940 · age 17

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 — Bronx-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02492-00641)

Line	Name	Age	Relation	Occupation	Birthplace
41	Irving Emanuel	32	Son in law	Clerk	New York
42	Frances Emanuel	30	Daughter	—	New York
43	Leo Emanuel	0	Son	—	New York
44	Robert S. Maclean	61	Head	Carpenter	New York
45	Gertie E. Maclean	75	Wife	—	New York
46	William Cassidy	55	Head	Fireman	New York
47	Elizabeth Cassidy	43	Wife	—	New York
48	Mary Cassidy	17	Daughter	—	New York
49	Arthur Cassidy	15	Son	—	New York
50	William Cassidy THIS PERSON	12	Son	—	New York
51	Roger J. Kinn	35	Head	Clerical	New York
52	Dorothy A. Kinn	34	Wife	—	New York
53	Roger J. Jr. Kinn	9	Son	—	New York
54	Mary Kinn	5	Daughter	—	New York
55	Victor Richards	40	Head	Draftsman	New York
56	Ellen Richards	79	Mother	—	England
57	James Sharkey	30	Head	Installer	New York
58	Florence Sharkey	25	Wife	—	New York
59	James Sharkey	0	Son	—	New York
60	Albert Keilbach	33	Head	Foreman	Germany
61	Dorothy Keilbach	26	Wife	Operator	New York
62	Curtis Eberhardt	38	Head	Motorman	New York
63	Anna Eberhardt	36	Wife	—	Austria
64	Curtis Jr. Eberhardt	6	Son	—	New York
65	Nellie Miles	63	Head	Card Repairer	Massachusetts
66	Howard Miles	26	Son	Painter	New Jersey
67	Thomas Hackley	59	Head	Consultant	New York
68	Minnie Hackley	60	Wife	—	New Jersey
69	George Swift	33	Head	Editor	New York
70	Grace Swift	32	Wife	Secretary	New York
71	Edward A. Brady	37	Head	Carpenter	New York
72	Mary R. Brady	37	Wife	—	New York
73	Edward G. Brady	9	Son	—	New York
74	Herrmann Dittmar	43	Head	Route Salesman	New York
75	Elizabeth Dittmar	41	Wife	—	New York
76	Dorothy Dittmar	17	Daughter	—	New York
77	Ruth Dittmar	13	Daughter	—	New York
78	John J. A. Conlin	58	Head	Attendant	New York
79	Mary Conlin	48	Wife	—	New York
80	August Miller	67	Head	Brakeman	Germany

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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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