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John Monahan — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this John Monahan across the 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 11-person household.

Age 20 b. ~1920 Male Son Born: New York Single

1940 Census Record Details

Census Year1940
LocationNew-York-County, New York
SurnameMonahan
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceWhite
Age20
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Manhattan
1935 Residence (County)New York
Additional Details
Occupationgrocery boy
Industrygrocery store
Class of WorkerPW
Hours Worked48
Income (1939)300
Highest GradeNo 5
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationGrocery Boy
Township / WardManhattan
Est. Birth Year~1920

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 1940 census.

Name Relation to head Relative to John Age Birth yr
Timothy Monahan Son — 7 ~1933
John Monahan Head — 49 ~1891
Daniel Monahan Son — 16 ~1924
Hugh Monahan Son — 14 ~1926
Kathleen Monahan Daughter — 18 ~1922
William Monahan Son — 3 ~1937
James Monahan Son — 12 ~1928
Gerald Monahan Son — 23 ~1917
John Monahan Son — 20 ~1920
Infant Monahan Daughter — ~1940
Julia Monahan Spouse — 44 ~1896

Census Appearances

1930
New York, …
Son, age 9
New York, New York · implied b. ~1921 — 3 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Monahan
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 9
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New Jersey
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
New-York-County, New …
Son, age 20
New-York-County, New York · implied b. ~1920 — 11 household members
Surname Monahan
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 20
Marital Status Single
Birthplace New York
1935 Residence (City) Manhattan
1935 Residence (County) New York
Occupation grocery boy
Industry grocery store
Class of Worker PW
Hours Worked 48
Income (1939) 300
Highest Grade No 5
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 John Monahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Monahan
Son · 1940 · age 20 · b. ~1920 · New York
★ You are viewing this record
Sibling
Kathleen Monahan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Timothy Monahan
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Monahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Infant Monahan
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Monahan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Monahan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Monahan
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Monahan
Sibling · 1940 · age 12
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 — New-York-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02650-00879)

Line Name Age Relation Occupation Birthplace
41 William Young 75 Head — New York
42 William Wilson 56 Head Elevator Operator Eire
43 Mary Wilson 54 Wife — Eire
44 Edward Wilson 26 Son — New York
45 Irene Wilson 21 Daughter Elevator Operator New York
46 Gustav Schafenberg 53 Head Factory Worker Poland
47 Gladys Schafenberg 51 Wife Garage Worker Poland
48 Loretta Schafenberg 17 Daughter — New York
49 Alfredia Schafenberg 15 Daughter — New York
50 John Monahan 49 Head Laborer Eire
51 Julia Monahan 44 Wife — Eire
52 Gerald Monahan 23 Son Laborer New York
53 John Monahan THIS PERSON 20 Son Grocery Boy New York
54 Kathleen Monahan 18 Daughter — New York
55 Daniel Monahan 16 Son — New York
56 Hugh Monahan 14 Son — New York
57 James Monahan 12 Son — New York
58 Timothy Monahan 7 Son — New York
59 William Monahan 3 Son — New York
60 Infant Monahan 0 Daughter — New York
61 Raymond Von Maluski 38 Head — Germany
62 Emil Von Maluski 33 Wife Timber Man Germany
63 Robert Von Maluski 16 Son — New York
64 Udel Von Maluski 15 Daughter — New York
65 Frederick Von Maluski 13 Son — New York
66 Claudia Turpin 50 Head House Maid Brit. W. Ind.
67 Hazel Turpin 17 Daughter — New York
68 Audrey Carpenter 20 Daughter — New York
69 Beverly Carpenter 2 Grand-daughter — New York
70 Otto Groell 55 Head Laborer New York
71 Catherine Connelly 62 Border — New York
72 Joseph Durant 39 Head Labour Vermont
73 Mabel Durant 40 Wife — Vermont
74 John Durant 16 Son — Vermont
75 Corrine Durant 12 Daughter — Vermont
76 Pearl Durant 10 Daughter — New York
77 Madeline Durant 9 Daughter — New York
78 Ralph Berger 43 Head Laborer New York
79 Mary Berger 46 Wife — New York
80 Robert J. Berger 22 Son Laborer New York

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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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