Mary Cahill — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Cahill across the 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 8-person household.

Age 48 b. ~1892 Female Spouse Born: Irish Free State Married

1940 Census Record Details

Census Year	1940
Location	New-York-County, New York
Surname	Cahill
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Irish Free State
1935 Residence (City)	N.Y. City
Naturalization Status	Naturalized
Additional Details
Highest Grade	No 8
1935 Residence	Same place
Birthplace (normalized)	irish free state
Township / Ward	Ny City
Est. Birth Year	~1892

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
Mary Cahill	Spouse	—	48	~1892
John Cahill	Head	—	55	~1885
Margaret Cahill	Daughter	—	25	~1915
John Cahill	Son	—	22	~1918
Patrick Cahill	Son	—	24	~1916
Frances Cahill	Daughter	—	17	~1923
Irene Cahill	Daughter	—	19	~1921
Theresa Cahill	Daughter	—	14	~1926

Census Appearances

1930

New York, …

Spouse, age 39

New York, New York · implied b. ~1891 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cahill
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	39
Marital Status	Married
Birthplace	Irish Free State
Year of Immigration	1911
Age at First Marriage	21
Father's Birthplace	Irish Free State
Mother's Birthplace	Irish Free State
Can Read/Write	Yes
Mother Tongue	English
Birthplace (normalized)	irish free state

1940

New-York-County, New …

Spouse, age 48

New-York-County, New York · implied b. ~1892 — 8 household members

Surname	Cahill
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Irish Free State
1935 Residence (City)	N.Y. City
Naturalization Status	Naturalized
Highest Grade	No 8
1935 Residence	Same place
Birthplace (normalized)	irish free state

Model Tree

Linked across censuses

Our Model Tree links Mary Cahill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Cahill

Spouse · 1940 · age 48 · b. ~1892 · New York

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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-t0627-02645-00062)

Line	Name	Age	Relation	Occupation	Birthplace
1	Ada Ciotti	29	Daughter	Stenographer	N.Y.
2	Zabal Fidel	38	Head	Counter-Man	Spain
3	Nuria Fidel	35	Wife	—	Spain
4	Hubert J. Stockel	41	Head	Laborer	N.Y.
5	May Masterson	49	Boarder	Dress Maker	N.Y.
6	Josephine Castronovo	42	Head	Brancher	Italy
7	Frances Castronovo	18	Daughter	Brancher	Italy
8	Elizabeth Taber	45	Head	Editing	N.Y.
9	Grace Sloan	55	Head	Clerk	N.Y.
10	Louis Puentes	38	Head	Waiter	Spain
11	Consuelo Puentes	29	Wife	Singer	Spain
12	Salvatore Imperato	40	Head	Owner	N.Y.
13	Rose Imperato	32	Wife	—	N.Y.
14	Ralph Imperato	8	Son	—	N.Y.
15	Joseph Imperato	3	Son	—	N.Y.
16	Alexander Diamond	36	Head	Chauffeur	N.Y.
17	Lillian Diamond	35	Wife	—	N.Y.
18	Bernard Diamond	10	Son	—	N.Y.
19	Gerald Diamond	4	Son	—	N.Y.
20	Harris Podolsky	72	Father-in-law	—	Russia
21	Bessie Podolsky	62	Mother-in-law	—	Russia
22	Pauline Podolsky	38	Sister-in-law	Clerk	N.Y.
23	Max Wolhandler	55	Head	News Dealer	Russia
24	Blanche Wolhandler	49	Wife	—	Poland
25	Malvina Wolhandler	25	Daughter	Bookkeeper	N.Y.
26	Ethel Wolhandler	22	Daughter	Bookkeeper	N.Y.
27	Joseph Wolhandler	20	Son	—	N.Y.
28	Shirley Wolhandler	16	Daughter	—	N.Y.
29	John F. Cahill	55	Head	Clerk	Irish Free State
30	Mary Cahill THIS PERSON	48	Wife	—	Irish Free State
31	Margaret Cahill	25	Daughter	Clerk	N.Y.
32	Patrick J. Cahill	24	Son	Packer	N.Y.
33	John Cahill	22	Son	Clerk	N.Y.
34	Irene Cahill	19	Daughter	—	N.Y.
35	Frances Cahill	17	Daughter	—	N.Y.
36	Theresa Cahill	14	Daughter	—	N.Y.
37	Bernard Altman	33	Head	Labor Organizer	N.Y.
38	Jay Altman	32	Brother	Entertainer	N.Y.
39	Ralph Altman	31	Brother	Traffic Mgr.	N.Y.
40	David Altman	24	Brother	—	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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