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Mary Cahill — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Cahill across the 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1904), then head of a 8-person household.

Age 36 b. ~1904 Female Spouse Born: Ireland Married

1940 Census Record Details

Census Year1940
LocationBronx-County, New York
SurnameCahill
Given NameMary A.
Relationship to HeadWife
SexF
Color / RaceWhite
Age36
Marital StatusMarried
BirthplaceIreland
1935 Residence (City)N.Y.C.
1935 Residence (County)Bronx
Naturalization StatusAlien
Additional Details
OccupationHouse
IndustryWife
Income (1939)0
Highest GradeNo 6
1935 ResidenceSame Place
Birth CountryIreland
Birthplace (normalized)ireland
OccupationHouse
Township / WardNyc
Est. Birth Year~1904

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.

8 people recorded at the same address in the 1940 census.

Name Relation to head Relative to Mary Age Birth yr
John Cahill Son — 3 ~1937
Mary Cahill Spouse — 36 ~1904
Mary Cahill Daughter — 8 ~1932
Alice Cahill Daughter — 7 ~1933
Denise Cahill Daughter — 5 ~1935
Kathleen Cahill Daughter — 10 ~1930
Agnes Cahill Daughter — 1 ~1939
John Cahill Head — 46 ~1894

Census Appearances

1930
New York, …
Spouse, age 28
New York, New York · implied b. ~1902 — 3 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Cahill
Given Name Mary T.
Relationship to Head Wife
Sex F
Color / Race White
Age 28
Marital Status Married
Birthplace Ireland
Naturalization Status Naturalized
Year of Immigration 1919
Age at First Marriage 22
Father's Birthplace Ireland
Mother's Birthplace Ireland
Occupation none
Can Read/Write Yes
Mother Tongue English
Birth Country Ireland
Birthplace (normalized) ireland
1940
Bronx-County, New …
Spouse, age 36
Bronx-County, New York · implied b. ~1904 — 8 household members
Surname Cahill
Given Name Mary A.
Relationship to Head Wife
Sex F
Color / Race White
Age 36
Marital Status Married
Birthplace Ireland
1935 Residence (City) N.Y.C.
1935 Residence (County) Bronx
Naturalization Status Alien
Occupation House
Industry Wife
Income (1939) 0
Highest Grade No 6
1935 Residence Same Place
Birth Country Ireland
Birthplace (normalized) ireland

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 Cahill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cahill
Spouse · 1940 · age 36 · b. ~1904 · New York
★ You are viewing this record
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Bronx-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02483-00679)

Line Name Age Relation Occupation Birthplace
41 Mary P. Fitzgerald 27 Daughter Clerk N.Y.
42 William Fitzgerald 23 Son Railway N.Y.
43 John P. Mcclafferty 31 Head Railway Irish Free State
44 Catherine Mcclafferty 30 Wife House N.Y.
45 Mary Mcclafferty 3 Daughter — N.Y.
46 James P. Shanley 68 Head Court Clerk Irish Free State
47 Catherine Shanley 68 Wife House England
48 George J. Hennion 33 Head Ass Engineer N.Y.
49 Elizabeth Hennion 31 Wife House N.Y.
50 Elizabeth Hennion 7 Daughter — N.Y.
51 George J. Jr. Hennion 5 Son — N.Y.
52 Cornelius Fitzgerald 42 Head Guard Ireland
53 Margaret P. Fitzgerald 40 Wife House Ireland
54 John Fitzgerald 16 Son School N.Y.
55 Cornelius Jr. Fitzgerald 14 Son School N.Y.
56 Thomas Fitzgerald 9 Son — N.Y.
57 Edmund Fitzgerald 5 Son — N.Y.
58 John Cahill 46 Head Helper Ireland
59 Mary A. Cahill THIS PERSON 36 Wife House Ireland
60 Kathleen Cahill 10 Daughter — New York
61 Mary Cahill 8 Daughter — New York
62 Alice Cahill 7 Daughter — N.Y.
63 Denise Cahill 5 Daughter — N.Y.
64 John Jr. Cahill 3 Son — N.Y.
65 Agnes Cahill 1 Daughter — N.Y.
66 John H. O'Brien 31 Head Photo N.Y.
67 Dorothy G. O'Brien 26 Wife House N.Y.
68 Janet O'Brien 4 Daughter — N.Y.
69 Frank Barile 48 Head Ice Man Italy
70 Anna Barile 45 Wife House Italy
71 Selma Barile 21 Daughter Dress N.Y.
72 Anthony Barile 20 Son Tool N.Y.
73 Jeanet Barile 16 Daughter School N.Y.
74 Frank Jr. Barile 13 Son — N.Y.
75 Rosa Barile 12 Daughter — N.Y.
76 Pietro De Vito 40 Head Ice Man Italy
77 Marie De Vito 26 Wife House Connecticut
78 Mary De Vito 14 Daughter — N.Y.
79 Frank De Vito 13 Son — N.Y.
80 Anthony De Vito 7 Son — N.Y.

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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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