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John Mcmahon — 1930 US Census Record

Model Tree available

1930 United States Federal Census · Kings, New York

Our Model Tree links this John Mcmahon across the 1910, 1920 and 1930 US Censuses in Kings, New York (XGBoost, ~Confirmed), with identified parents Catharine & Katherine — first a son (b.~1901), then head of a 6-person household.

Age 29 b. ~1901 Male Son Born: New York Single

1930 Census Record Details

Census Year1930
LocationKings, New York
SurnameMcMahon
Given NameJohn
Relationship to Headson
SexM
Color / RaceWhite
Age29
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceNew York
Mother's BirthplaceNew York
Additional Details
Occupationsalesman
Industryauto concern
Class of WorkerW
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationSalesman
Township / WardBrooklyn Borough
Est. Birth Year~1901

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.

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

Name Relation to head Relative to John Age Birth yr
Anna Schultz Daughter — 24 ~1906
Grace Mcmahon Daughter — 33 ~1897
Otto Schultz Head — 50 ~1880
Rose Mcmahon Other — 61 ~1869
John Mcmahon Son — 29 ~1901
Estelle Schultz Spouse — 45 ~1885

Census Appearances

1910
Kings, New …
Son, age 11
Kings, New York · implied b. ~1899 — 8 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 11
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Can Read Yes
Can Write Yes
Speaks English English
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1920
Kings, New …
Son, age 20
Kings, New York · implied b. ~1900 — 10 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 20
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Occupation Clerk
Industry Wholesale Dry Goods
Class of Worker W
Can Read No
Can Write Yes
Speaks English Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Kings, New …
Son, age 29
Kings, New York · implied b. ~1901 — 6 household members
Surname McMahon
Given Name John
Relationship to Head son
Sex M
Color / Race White
Age 29
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Occupation salesman
Industry auto concern
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.
Model Tree available
Our Model Tree links John Mcmahon across 3 US Census years (1910, 1920 and 1930) in Kings, New York, using XGBoost record linkage. Identified parents: mother Catharine Mcmahon (~0.92 confidence) and mother Katherine Mcmahon (~0.92 confidence) and father Bernard Mcmahon (~0.92 confidence) and father Otto Schultz (~0.92 confidence) and mother Estelle Schultz (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Mother
Catharine Mcmahon
b. ~1863
Source mother
● Household · direct · ~0.92
Mother
Katherine Mcmahon
b. ~1865
Source mother
● Household · direct · ~0.92
Father
Bernard Mcmahon
b. ~1866
Source father
● Household · direct · ~0.92
Father
Otto Schultz
b. ~1880
Source father
● Household · direct · ~0.92
Mother
Estelle Schultz
b. ~1885
Source mother
● Household · direct · ~0.92
This person
Anchor record
John Mcmahon
Son · 1930 · age 29 · b. ~1901 · New York
★ You are viewing this record
Sibling
Anna Schultz
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Mcmahon
Sibling · 1930 · age 33
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:newyorkcensus00reel1496:0486)

Line Name Age Relation Occupation Birthplace
1 Ira Hodes 37 Head Office Clerk New York
2 Isabel Hodes 31 wife None New York
3 Ethel Alice Hodes 9 daughter None New York
4 Stewart Hodes 5 son None New York
5 Philip Guck 39 Head Clerk New York
6 Elizabeth Guck 51 wife None New York
7 Bertram Peterson 40 Head Accountant Illinois
8 Lillian Peterson 38 wife None Illinois
9 Bertram Peterson 5 son None Illinois
10 Harold Peterson 3 son None New York
11 Frank Colorossi 54 Head Playwright Italy
12 Helen Colorossi 42 wife None Italy
13 Peter Bartolello 49 Head Laborer Italy
14 Grace Bartolello 42 wife None Italy
15 Julia Bartolello 24 daughter Machinist New York
16 Jennie Bartolello 22 daughter Machinist New York
17 Angelina Bartolello 19 daughter Dressmaker New York
18 Peter Bartolello 17 son None New York
19 Joseph Bartolello 15 son None New York
20 Rose Bartolello 13 daughter None New York
21 Anita Bartolello 9 daughter None New York
22 Henry Bartolello 5 son None New York
23 Corinne Bartolello 1 daughter None New York
24 Mary Matthews 46 mother None Pennsylvania
25 Joseph Matthews 27 son Tube Clerk Pennsylvania
26 Helen Matthews 20 daughter Bookkeeper Pennsylvania
27 Mary Matthews 17 daughter None Pennsylvania
28 Marion Locke 44 roomer Writer Texas
29 William M Burgess 22 lodger Salesman Oklahoma
30 Otto A Schultz 50 head Salesman Illinois
31 Estelle Schultz 45 wife None New York
32 Anna Schultz 24 daughter Artist New York
33 Rose Mcmahon 61 mother None New York
34 Grace Mcmahon 33 daughter Teacher New York
35 John Mcmahon THIS PERSON 29 son Salesman New York
36 Peter W Jessam 54 head Salesman England
37 Alma Jessam 39 wife None New York
38 Percy Jessam 15 son None New York
39 Charles Jessam 12 son None New York
40 Allen Jessam 10 son None New York
41 Mayme Jessam 7 daughter None New York
42 Daniel Cooney 28 head Salesman New York
43 Mae Cooney 28 wife None New York
44 Margaret Cooney 3 daughter None New York
45 John F Brennan 59 head Waterman New York
46 Norah Brennan 58 wife None New York
47 Agnes Brennan 24 daughter None New York
48 Arthur Magan 36 son-in-law Clerk New York
49 Betty Magan 12 daughter None New York
50 Patricia Magan 8 daughter None New York

Related Census Records

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Pedigree Summary

John + 2 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 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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