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John Hennessey — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · New York, New York

Our Model Tree links this John Hennessey across the 1930 and 1940 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 11-person household.

Age 12 b. ~1918 Male Son Born: New York Single

1930 Census Record Details

Census Year	1930
Location	New York, New York
Surname	Hennessey
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	12
Marital Status	Single
Birthplace	New York
Father's Birthplace	Irish Free State
Mother's Birthplace	Irish Free State
Additional Details
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Township / Ward	New York City
Est. Birth Year	~1918

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.

11 people recorded at the same address in the 1930 census.

Name	Relation to head	Relative to John	Age	Birth yr
Helen Hennessey	Daughter	—	22	~1908
Anna Hennessey	Daughter	—	24	~1906
Alice Hennessey	Daughter	—	20	~1910
William Hennessey	Son	—	18	~1912
Mary Hennessey	Daughter	—	30	~1900
Joseph Hennessey	Son	—	26	~1904
Thomas Hennessey	Son	—	16	~1914
Emelia Hennessey	Daughter	—	14	~1916
Edward Hennessey	Son	—	28	~1902
John Hennessey	Son	—	12	~1918
Johanna Hennessey	Head	—	62	~1868

Census Appearances

1930

New York, …

Son, age 12

New York, New York · implied b. ~1918 — 11 household members

Surname	Hennessey
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	12
Marital Status	Single
Birthplace	New York
Father's Birthplace	Irish Free State
Mother's Birthplace	Irish Free State
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

New-York-County, New …

Son, age 24

New-York-County, New York · implied b. ~1916 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hennessy
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	24
Marital Status	Single
Birthplace	New York
1935 Residence (City)	New York City
1935 Residence (County)	New York
Occupation	Sailor
Industry	Clothing Store
Class of Worker	PW
Hours Worked	38
Income (1939)	752
Highest Grade	No 8
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

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

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This person

Anchor record

John Hennessey

Son · 1930 · age 12 · b. ~1918 · New York

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Sibling

Helen Hennessey

Sibling · 1930 · age 22

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

William Hennessey

Sibling · 1930 · age 18

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Joseph Hennessey

Sibling · 1930 · age 26

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Emelia Hennessey

Sibling · 1930 · age 14

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Anna Hennessey

Sibling · 1930 · age 24

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Edward Hennessey

Sibling · 1930 · age 28

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Thomas Hennessey

Sibling · 1930 · age 16

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Alice Hennessey

Sibling · 1930 · age 20

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Mary Hennessey

Sibling · 1930 · age 30

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

1930 US Federal Census — New York, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1570:0580)

Line	Name	Age	Relation	Occupation	Birthplace
51	Lillian	23	Daughter	Clerk	New York
52	Helen	21	Daughter	Clerk	New York
53	William	41	Son	Clerk	New York
54	Anna	40	Daughter-in-law	Clerk	New York
55	William	18	Grandson	Clerk	New York
56	Edward	15	Grandson	—	New York
57	Thomas	13	Grandson	—	New York
58	Joseph Perrin	32	Head	Clerk	New York
59	Clara Perrin	32	Wife	—	New York
60	Joseph Jr. Perrin	10	Son	—	New York
61	Robert Perrin	8	Son	—	New York
62	Ellen Sullivan	54	Head	Janitress	Irish Free State
63	John Sullivan	25	Son	Clerk	New York
64	William O'Neil	29	Boarder	Clerk	New York
65	Lillian O'Neil	27	Boarder	—	New York
66	Mary Donnelly	60	Head	Janitress	New York
67	Margaret Donnelly	24	Daughter	Clerk	New York
68	Mary Donnelly	22	Daughter	Clerk	New York
69	Joseph Donnelly	20	Son	Clerk	New York
70	Edward Donnelly	17	Son	Clerk	New York
71	Catherine Donnelly	15	Daughter	—	New York
72	Alice Donnelly	13	Daughter	—	New York
73	Agnes Donnelly	11	Daughter	—	New York
74	Thomas Donnelly	9	Son	—	New York
75	William Donnelly	7	Son	—	New York
76	Eugene Donnelly	5	Son	—	New York
77	Johanna Hennessey	62	Head	Janitress	Irish Free State
78	Mary Hennessey	30	Daughter	Clerk	New York
79	Edward Hennessey	28	Son	Clerk	New York
80	Joseph Hennessey	26	Son	Clerk	New York
81	Anna Hennessey	24	Daughter	Clerk	New York
82	Helen Hennessey	22	Daughter	Clerk	New York
83	Alice Hennessey	20	Daughter	Clerk	New York
84	William Hennessey	18	Son	Clerk	New York
85	Thomas Hennessey	16	Son	Clerk	New York
86	Emelia Hennessey	14	Daughter	—	New York
87	John Hennessey THIS PERSON	12	Son	—	New York
88	Joseph Mullen	65	Head	Janitor	Irish Free State
89	Mary Mullen	62	Wife	—	Irish Free State
90	Joseph Jr. Mullen	32	Son	Clerk	New York
91	Mary Mullen	30	Daughter	Clerk	New York
92	Alice Mullen	28	Daughter	Clerk	New York
93	Edward Mullen	26	Son	Clerk	New York
94	Helen Mullen	24	Daughter	Clerk	New York
95	William Mullen	22	Son	Clerk	New York
96	Thomas Mullen	20	Son	Clerk	New York
97	Agnes Mullen	18	Daughter	Clerk	New York
98	Catherine Mullen	16	Daughter	—	New York
99	John Mullen	14	Son	—	New York
100	Eugene Mullen	12	Son	—	New York

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1930 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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