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Mary Hennessey — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Kings, New York

Our Model Tree links this Mary Hennessey across the 1930 and 1940 US Censuses in Kings, New York (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 10-person household.

Age 9 b. ~1921 Female Daughter Born: New York Single

1930 Census Record Details

Census Year1930
LocationKings, New York
SurnameHennessey
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age9
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceNew York
Mother's BirthplaceIreland
Additional Details
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardBorough Of Brooklyn
Est. Birth Year~1921

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.

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

Name Relation to head Relative to Mary Age Birth yr
Thomas Hennessey Head — 45 ~1885
Francis Hennessey Son — ~1930
James Hennessey Son — 2 ~1928
Nellie Hennessey Spouse — 45 ~1885
John Hennessey Son — 13 ~1917
Thomas Hennessey Son — 15 ~1915
Mary Hennessey Daughter — 9 ~1921
Joseph Hennessey Son — 11 ~1919
Catherine Hennessey Daughter — 4 ~1926
William Hennessey Son — 7 ~1923

Census Appearances

1930
Kings, New …
Daughter, age 9
Kings, New York · implied b. ~1921 — 10 household members
Surname Hennessey
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 9
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace Ireland
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Kings-County, New …
Daughter, age 19
Kings-County, New York · implied b. ~1921 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Hennessy
Given Name Marie
Relationship to Head Daughter
Sex F
Color / Race White
Age 19
Marital Status Single
Birthplace New York
1935 Residence (City) New York City
1935 Residence (County) Kings
Occupation Clerical
Industry Plumbing Co.
Class of Worker PW
Hours Worked 40
Income (1939) 450
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.
Linked across censuses
Our Model Tree links Mary Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessey
Daughter · 1930 · age 9 · b. ~1921 · New York
★ You are viewing this record
Sibling
Joseph Hennessey
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hennessey
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hennessey
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Hennessey
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Hennessey
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Hennessey
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Hennessey
Sibling · 1930 · age 2
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 — Kings, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1505:0192)

Line Name Age Relation Occupation Birthplace
1 James Lynch 42 Head Cashier Ireland
2 Catherine Lynch 38 Wife — New York
3 Catherine Lynch 11 Daughter — New York
4 James Lynch 9 Son — New York
5 Grace Lynch 5 Daughter — New York
6 Louis Verrone 53 Head Conductor New York
7 Anna Verrone 49 Wife — New York
8 James Gaffney 48 Head Conductor Ireland
9 Nellie Gaffney 43 Wife — Ireland
10 Walter Gaffney 18 Son — New York
11 Nellie Gaffney 12 Daughter — New York
12 James Gaffney 4 Son — New York
13 John Gaffney 1 Son — New York
14 Thomas Hennessey 45 Head Clerk New York
15 Nellie Hennessey 45 Wife — Ireland
16 Thomas Hennessey 15 Son — New York
17 John Hennessey 13 Son — New York
18 Joseph Hennessey 11 Son — New York
19 Mary Hennessey THIS PERSON 9 Daughter — New York
20 William Hennessey 7 Son — New York
21 Catherine Hennessey 4 Daughter — New York
22 James Hennessey 2 Son — New York
23 Francis Hennessey 0 Son — New York
24 Joseph Anderson 43 Head Patrolman New York
25 Emma Anderson 42 Wife — New York
26 Joseph Anderson 18 Son — New York
27 Frank Anderson 13 Son — New York
28 Emma Anderson 10 Daughter — New York
29 Helen Anderson 8 Daughter — New York
30 George Anderson 6 Son — New York
31 Robert Anderson 4 Son — New York
32 Arthur Anderson 2 Son — New York
33 Walter Anderson 0 Son — New York
34 Victor Muller 46 Head Conductor New York
35 Anna Muller 45 Wife — New York
36 Victor Muller 18 Son — New York
37 Anna Muller 16 Daughter — New York
38 Helen Muller 14 Daughter — New York
39 George Muller 12 Son — New York
40 William Muller 10 Son — New York
41 Edward Muller 8 Son — New York
42 Catherine Muller 6 Daughter — New York
43 Joseph Muller 4 Son — New York
44 Francis Muller 2 Son — New York
45 James Muller 0 Son — New York
46 Louis Lester 22 Head Driver Germany
47 Eva Lester 21 Wife — Germany
48 Louis Lester 0 Son — New York
49 Irving Mount 35 Head Sign Painter New York
50 Helen Mount 33 Wife — 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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