Mary Duncan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Wayne-County, Michigan

Our Model Tree links this Mary Duncan across the 1920, 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 2-person household.

Age 55 b. ~1885 Female Head Born: Maryland Widowed

1940 Census Record Details

Census Year	1940
Location	Wayne-County, Michigan
Surname	Duncan
Given Name	Mary V.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	55
Marital Status	Widowed
Birthplace	Maryland
1935 Residence (City)	Dearborn
1935 Residence (County)	Wayne
Additional Details
Income (1939)	0
Highest Grade	C 3
1935 Residence	Michigan
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland
Township / Ward	Detroit City
Est. Birth Year	~1885

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Duncan	Head	—	55	~1885
Robert Duncan	Son	—	23	~1917

Census Appearances

1920

Wayne, Michigan

Spouse, age 34

Wayne, Michigan · implied b. ~1886 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	Mamie
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Maryland
Father's Birthplace	Maryland
Mother's Birthplace	Maryland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1930

Wayne, Michigan

Other, age 44

Wayne, Michigan · implied b. ~1886 — 10 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	Mamie B
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	44
Marital Status	Married
Birthplace	Maryland
Age at First Marriage	23
Father's Birthplace	Maryland
Mother's Birthplace	Maryland
Occupation	none
Can Read/Write	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1940

Wayne-County, Michigan

Head, age 55

Wayne-County, Michigan · implied b. ~1885 — 2 household members

Surname	Duncan
Given Name	Mary V.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	55
Marital Status	Widowed
Birthplace	Maryland
1935 Residence (City)	Dearborn
1935 Residence (County)	Wayne
Income (1939)	0
Highest Grade	C 3
1935 Residence	Michigan
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

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

Head · 1940 · age 55 · b. ~1885 · Michigan

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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 — Wayne-County, Michigan Open full size

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-01891-00678)

Line	Name	Age	Relation	Occupation	Birthplace
1	William Parker	50	Head	Service Man	Ireland
2	Rose Parker	44	Wife	—	Michigan
3	Helena Parker	12	Daughter	—	Michigan
4	Alexander Parker	13	Son	—	Michigan
5	William Parker	10	Son	—	Michigan
7	John Mclean	29	Head	Book Clerk	Scotland
8	Marjorie Mclean	26	Wife	—	Michigan
9	Dolores Mclean	4	Daughter	—	Michigan
10	Claire Fuller	32	Head	Dock Foreman	Michigan
11	Lorena Fuller	32	Wife	Social Worker	Missouri
12	James Fuller	10	Son	—	Missouri
13	Leonard Warner	48	Head	Repair Man	Indiana
14	Elizabeth Warner	38	Wife	—	Scotland
15	Martha Warner	18	Daughter	Stenographer	Michigan
16	Claude Love	54	Head	Tractor-Forman	Michigan
17	Violet Love	52	Wife	—	England
18	Jack Love	19	Son	Grocery Clerk	Michigan
19	Lloyd Love	24	Son	Gas Station Attendant	Michigan
20	Mabel Love	21	Daughter	—	Michigan
21	Leroy Imbert	36	Head	Policeman	Ohio
22	Alice Imbert	36	Wife	—	Michigan
23	Richard Imbert	13	Son	—	Michigan
24	Ray Imbert	8	Son	—	Michigan
25	Kenneth Imbert	6	Son	—	Michigan
26	Harry Cruden	28	Head	Crane Operator	Scotland
27	Agnes Cruden	25	Wife	—	Kansas
28	Victor Tallen	21	Son-in-law	Checker	Kansas
29	Nels Froslee	51	Head	Boiler Operator	New York
30	Arlene Froslee	45	Wife	—	Missouri
31	Mary V. Duncan THIS PERSON	55	Head	—	Maryland
32	Robert B. Duncan	23	Son	Car Builder	Maryland
33	Cyril Longstaff	38	Head	Tool Maker	England
34	Ollphie Longstaff	12	Daughter	—	England
35	Barbara Longstaff	8	Daughter	—	Michigan
37	John Buruliak	52	Head	Carpenter	Austria
38	Mary Buruliak	40	Wife	—	Canada
39	George Buruliak	18	Son	Gardener	Canada
40	Mitchell Buruliak	15	Son	—	Michigan

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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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