Mary Duncan — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Duncan across the 1920, 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1878), then head of a 5-person household.

Age 62 b. ~1878 Female Spouse Born: Scotland Married

1940 Census Record Details

Census Year	1940
Location	Westchester-County, New York
Surname	Duncan
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	62
Marital Status	Married
Birthplace	Scotland
1935 Residence (City)	North Tarrytown
1935 Residence (County)	Westchester
Naturalization Status	Alien
Additional Details
Occupation	0
Class of Worker	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Scotland
Birthplace (normalized)	scotland
Occupation	0
Township / Ward	North Tarrytown
Est. Birth Year	~1878

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Jane Gleason	Daughter	—	29	~1911
Ebenezer Duncan	Head	—	61	~1879
Thomas Gleason	Other	—	30	~1910
Jean Gleason	Other	—	7	~1933
Mary Duncan	Spouse	—	62	~1878

Census Appearances

1920

Westchester, New …

Spouse, age 42

Westchester, New York · implied b. ~1878 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	Mary J
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Scotland
Year of Immigration	1907
Naturalization Status	Naturalized
Father's Birthplace	Scotland
Mother's Birthplace	Scotland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Scotch
Birth Country	Scotland
Year of Naturalization	1915
Birthplace (normalized)	scotland

1930

Westchester, New …

Other, age 53

Westchester, New York · implied b. ~1877 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	Mary
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Scotland
Naturalization Status	Naturalized
Year of Immigration	1907
Age at First Marriage	22
Father's Birthplace	Scotland
Mother's Birthplace	Scotland
Occupation	none
Can Read/Write	Yes
Mother Tongue	Scotch
Birth Country	Scotland
Birthplace (normalized)	scotland

1940

Westchester-County, New …

Spouse, age 62

Westchester-County, New York · implied b. ~1878 — 5 household members

Surname	Duncan
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	62
Marital Status	Married
Birthplace	Scotland
1935 Residence (City)	North Tarrytown
1935 Residence (County)	Westchester
Naturalization Status	Alien
Occupation	0
Class of Worker	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Scotland
Birthplace (normalized)	scotland

Model Tree

Linked across censuses

Our Model Tree links Mary Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Duncan

Spouse · 1940 · age 62 · b. ~1878 · 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 — Westchester-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02805-00976)

Line	Name	Age	Relation	Occupation	Birthplace
1	George Distefano	15	Son	0	New York
2	Anna Ryan	64	Head	0	Irish Free State
3	Patrick Ryan	28	Son	Supply Clerk	New York
4	John Ryan	23	Son	Clerk	New York
5	John Kostrubal	49	Head	Laborer	Czechoslovakia
6	Mary Kostrubal	44	Wife	Cleaner	Czechoslovakia
7	John, Jr. Kostrubal	23	Son	Clerk	New York
8	Michael Kostrubal	18	Son	Messenger Boy	New York
9	Dorothy Kostrubal	16	Daughter	0	New York
10	Robert Kostrubal	14	Son	0	New York
11	Ruth Kostrubal	12	Daughter	0	New York
12	James Dennis	36	Head	Wet-Sander	Irish Free State
13	Bridgett Dennis	35	Wife	0	Irish Free State
14	Helen Marie Dennis	6	Daughter	0	New York
15	Catherine Dennis	5	Daughter	0	New York
16	Louis P. Gendron	34	Lodger	Soldierer	Canada-French
17	Ebenezer Duncan	61	Head	House Painter	Scotland
18	Mary Duncan THIS PERSON	62	Wife	0	Scotland
19	Thomas Gleason	30	Son-in-law	Chauffeur	New York
20	Jane Gleason	29	Daughter	Stenographer	New York
21	Jean Gleason	7	Grand-daughter	0	New York
22	Robert Hennessy	28	Head	Welder	New York
23	Rose Hennessy	23	Wife	Beautician	New York
24	Barbara Lee Hennessy	3	Daughter	0	New York
25	Catherine Castone	24	Sister-in-law	Beautician	New York
26	Victor Castone	46	Head	Supply Clerk	Italy
27	Rose Castone	38	Wife	0	Italy
28	Joseph Castone	17	Son	0	New York
29	Vincent Castone	14	Son	0	New York
30	Michael Castone	11	Son	0	New York
31	Anthony Castone	1	Son	0	New York
32	John Seminare	52	Head	0	Italy
33	Mario Seminare	26	Son	Wet-Sander	New York
34	Rose Seminare	24	Daughter	Beautician	New York
35	Fred Seminare	23	Son	Welder	New York
36	Edward Seminare	21	Son	Salesman	New York
37	Irene Seminare	18	Daughter	0	New York
38	Rosaria Muraca	87	Mother-in-law	0	Italy
39	Anthony Muraca	62	Brother-in-law	Grocer	Italy
40	Frank Monti	31	Head	Enamel Worker	Pennsylvania

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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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