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John Mcmahon — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Kings, New York

Our Model Tree links this John Mcmahon across the 1920 and 1930 US Censuses in Kings, New York (XGBoost, ~Confirmed) — first a son (b.~1913), then head of a 9-person household.

Age 17 b. ~1913 Male Son Born: New York Single

1930 Census Record Details

Census Year1930
LocationKings, New York
SurnameMcMahon
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceWhite
Age17
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceNew York
Mother's BirthplaceNew York
Additional Details
Occupationrunner
Industrybrokers office
Class of WorkerW
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationRunner
Township / WardBorough Brooklyn
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.

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

Name Relation to head Relative to John Age Birth yr
Beatrice Mcmahon Daughter — 11 ~1919
Rita Mcmahon Daughter — 14 ~1916
Bernadine Mcmahon Daughter — 6 ~1924
John Mcmahon Head — 42 ~1888
Florence Mcmahon Son — 3 ~1927
John Mcmahon Son — 17 ~1913
Richard Mcmahon Son — 13 ~1917
Frank Mcmahon Son — 16 ~1914
Mary Mcmahon Spouse — 42 ~1888

Census Appearances

1920
Kings, New …
Son, age 7
Kings, New York · implied b. ~1913 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
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 New York
Occupation none
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Kings, New …
Son, age 17
Kings, New York · implied b. ~1913 — 9 household members
Surname McMahon
Given Name John
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 New York
Occupation runner
Industry brokers office
Class of Worker W
Can Read/Write Yes
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 John Mcmahon across 2 US Census years (1920 and 1930) in Kings, New York, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcmahon
Son · 1930 · age 17 · b. ~1913 · New York
★ You are viewing this record
Sibling
Rita Mcmahon
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Mcmahon
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Mcmahon
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernadine Mcmahon
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mcmahon
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Mcmahon
Sibling · 1930 · age 11
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:newyorkcensus00reel1515:1007)

Line Name Age Relation Occupation Birthplace
1 Theodore 11 Son None New York
2 Walter 5 Son None New York
3 James Halley 31 Head Color Shader New York
4 Florence Halley 28 Wife None New York
5 Mary R. Halley 4 Daughter None New York
6 Joseph Rogers 53 Father-in-law Machinist New York
7 Charles Rogers 23 Brother-in-law Clerk - Shipping New York
8 Catherine Rogers 24 Sister-in-law None New York
9 Joseph Mcnerney 53 Head Starter New York
10 Mary Mcnerney 44 Wife None New York
11 James Mcnerney 24 Son Officer New York
12 Joseph Jr. Mcnerney 27 Son Chauffeur New York
13 John Mcnerney 21 Son Delivery Clerk New York
14 Margaret Mcnerney 13 Daughter None New York
15 Andrew Bennett 44 Head Construction New York
16 Jane Bennett 41 Wife None New York
17 Francis Bennett 22 Son Driver New York
18 Alice Bennett 18 Daughter Clerical New York
19 Jeanette Bennett 15 Daughter None New York
20 Ruth Bennett 13 Daughter None New York
21 Andrew Bennett 12 Son None New York
22 William Bennett 7 Son None New York
23 Max Chinovsky 30 Head Cigar Store Russia
24 Mary Chinovsky 24 Wife None Russia
25 Beatrice Chinovsky 2 Daughter None New York
26 Lillian Chinovsky 0 Daughter None New York
27 Rose Luchman 51 Mother-in-law None Russia
28 Sadie Luchman 22 Sister-in-law Typist New York
29 Thomas Derun 48 Head Chauffeur New York
30 Richard Derun 49 Wife None Delaware
31 Edward Derun 10 Son None New York
32 Ruth Derun 9 Daughter None New York
33 Grace Derun 80 Mother Helper New York
34 Thomas Derun 17 Brother-in-law None New Jersey
35 John Mcmahon 42 Head Foreman New York
36 Mary Mcmahon 42 Wife None New York
37 John Mcmahon THIS PERSON 17 Son Runner New York
38 Frank Mcmahon 16 Son Runner New York
39 Rita Mcmahon 14 Daughter None New York
40 Richard Mcmahon 13 Son Messenger New York
41 Beatrice Mcmahon 11 Daughter None New York
42 Bernadine Mcmahon 6 Daughter None New York
43 Florence Mcmahon 3 Son None New York
44 Richard Mcnerney 45 Head Order Clerk New York
45 Teresa Mcnerney 40 Wife None New York
46 Richard Mcnerney 2 Son None New York
47 James O'Toole 35 Brother-in-law Yard Man New York
48 Margaret O'Toole 23 Sister-in-law Operator New York
49 Rose O'Toole 17 Sister-in-law None New York
50 Anne O'Toole 15 Sister-in-law Packer 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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