Mary Brennan — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Brennan across the 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1896), then head of a 10-person household.

Age 44 b. ~1896 Female Spouse Born: New York Married

1940 Census Record Details

Census Year	1940
Location	Erie-County, New York
Surname	Brennan
Given Name	Mary J
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	44
Marital Status	Married
Birthplace	New York
1935 Residence (City)	Buffalo city
1935 Residence (County)	Erie
Additional Details
Income (1939)	0
Highest Grade	C 1
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Township / Ward	Buffalo City
Est. Birth Year	~1896

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Brennan	Daughter	—	17	~1923
Virginia Brennan	Daughter	—	18	~1922
Patricia Brennan	Daughter	—	3	~1937
Elizabeth Brennan	Daughter	—	12	~1928
Evelyn Brennan	Daughter	—	5	~1935
Lawrence Brennan	Head	—	46	~1894
William Brennan	Son	—	12	~1928
Gerard Brennan	Son	—	6	~1934
Richard Brennan	Son	—	19	~1921
Mary Brennan	Spouse	—	44	~1896

Census Appearances

1930

Erie, New …

Other, age 34

Erie, New York · implied b. ~1896 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Brennan
Given Name	Mary J
Relationship to Head	wife H
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	New York
Age at First Marriage	23
Father's Birthplace	New York
Mother's Birthplace	New York
Occupation	none
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Erie-County, New …

Spouse, age 44

Erie-County, New York · implied b. ~1896 — 10 household members

Surname	Brennan
Given Name	Mary J
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	44
Marital Status	Married
Birthplace	New York
1935 Residence (City)	Buffalo city
1935 Residence (County)	Erie
Income (1939)	0
Highest Grade	C 1
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Brennan

Spouse · 1940 · age 44 · b. ~1896 · 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 — Erie-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02839-00115)

Line	Name	Age	Relation	Occupation	Birthplace
41	Adrien J Allard	33	Head	Stock Broker	New York
42	Veronica M Allard	35	Wife	—	New York
43	Marcia P Allard	5	Daughter	—	New York
44	Ella Gurlock	21	Servant	Domestic	New York
45	David L Landy	31	Head	Lawyer	Massachusetts
46	Dorothy K Landy	30	Wife	—	Minnesota
47	Joan Barbara Landy	5	Daughter	—	New York
48	Sophie Rauske	35	Servant	Domestic	New York
49	Carlton E Jewett	51	Head	Proprietor	New York
50	Adelaide Pratt Jewett	51	Wife	—	New York
51	Carolyn E Jewett	17	Daughter	—	New York
52	Corrine G Nelson	34	Servant	Domestic	Sweden
53	Albert D Messersmith	60	Head	Dist Manager	New York
54	Frances L Messersmith	48	Wife	—	New York
55	Bridget O'Neil	50	Servant	Domestic	Northern Ireland
56	Thelma Havens	36	Lodger	Secretary	New York
57	Mary E Eddy	42	Head	—	Canada Eng
58	John Arthur Eddy	18	Son	—	New York
59	Helen Coughlin	52	Servant	Domestic	Eire
60	Charles B Lascelles	53	Head	Salesman	New York
61	Alice Lascelles	49	Wife	—	New York
62	Charles B Lascelles	22	Son	—	New York
63	Alice Mary Lascelles	10	Daughter	—	New York
64	Lawrence J Brennan	46	Head	Accountant	New York
65	Mary J Brennan THIS PERSON	44	Wife	—	New York
66	Richard G Brennan	19	Son	Aero Engineer	New York
67	Virginia F Brennan	18	Daughter	—	New York
68	Mary Julia Brennan	17	Daughter	—	New York
69	William J Brennan	12	Son	—	New York
70	Elizabeth H Brennan	12	Daughter	—	New York
71	Gerard A Brennan	6	Son	—	New York
72	Evelyn F Brennan	5	Daughter	—	New York
73	Patricia A Brennan	3	Daughter	—	New York
74	Robert J. S. Irvin	36	Head	Physician	Pennsylvania
75	Helen Irvin	34	Wife	—	New York
76	Robert J. S. Jr. Irvin	12	Son	—	New York
77	William E Irvin	9	Son	—	New York
78	Suzanne Irvin	6	Daughter	—	New York
79	Katherine S Kane	43	Servant	Domestic	New York
80	Luther E Wood	48	Head	Treasurer	Connecticut

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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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