John Cowan — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this John Cowan across the 1930 and 1940 US Censuses in Suffolk-County, New York (XGBoost, ~Confirmed) — first a head (b.~1915), then head of a 4-person household.

Age 25 b. ~1915 Male Head Born: New York Married

1940 Census Record Details

Census Year	1940
Location	Suffolk-County, New York
Surname	Cowan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	25
Marital Status	Married
Birthplace	New York
1935 Residence (City)	R
1935 Residence (County)	Suffolk
Additional Details
Occupation	Laborer
Industry	Bldg. Constr.
Class of Worker	PW
Hours Worked	20
Income (1939)	500
Highest Grade	No 3
1935 Residence	New York
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Occupation	Laborer
Township / Ward	Village Of Hauppauge
Est. Birth Year	~1915

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Virginia Cowan	Spouse	—	23	~1917
John Cowan	Son	—	4	~1936
John Cowan	Head	—	25	~1915
Mary Cowan	Daughter	—	3	~1937

Census Appearances

1930

Suffolk, New …

Son, age 14

Suffolk, New York · implied b. ~1916 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cowan
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	14
Marital Status	Single
Birthplace	New York
Father's Birthplace	Italy
Mother's Birthplace	Italy
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Suffolk-County, New …

Head, age 25

Suffolk-County, New York · implied b. ~1915 — 4 household members

Surname	Cowan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	25
Marital Status	Married
Birthplace	New York
1935 Residence (City)	R
1935 Residence (County)	Suffolk
Occupation	Laborer
Industry	Bldg. Constr.
Class of Worker	PW
Hours Worked	20
Income (1939)	500
Highest Grade	No 3
1935 Residence	New York
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

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

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This person

Anchor record

John Cowan

Head · 1940 · age 25 · b. ~1915 · 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 — Suffolk-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02788-00400)

Line	Name	Age	Relation	Occupation	Birthplace
1	Dorothea G. Seaver	40	Wife	—	New York
2	William Seaver	21	Son	—	New York
3	Penelope Seaver	20	Daughter	—	New York
4	William Seaver	10	Son	—	New York
5	Marilyn Seaver	6	Daughter	—	New York
6	Carol Moore	6	Daughter	—	New York
7	Katherine Richardson	21	Waitress	Waitress	New York
8	Charles Spencer	42	Poultryman	Poultryman	New York
9	Harry Stewart	26	Poultryman	Poultryman	New York
10	John Lawrence	25	Poultryman	Poultryman	New York
11	Clifford Randolph	25	Poultryman	Poultryman	New York
12	Anatole Johnson	30	Poultryman	Poultryman	New York
13	Ernest Singer	25	Poultryman	Poultryman	North Carolina
14	Algernon Singer	21	Poultryman	Poultryman	North Carolina
15	—	None	—	—	—
16	Herbert Weikert	60	Head	Proprietor	New York
17	Lyla Weikert	49	Wife	Helper	New York
18	Pericles Kappandakis	60	Head	—	New York
19	Marie C. Kappandakis	49	Wife	—	New York
20	Antonia Kappandakis	21	Daughter	Beautician	New York
21	Naida Kappandakis	17	Daughter	—	New York
22	Barbara Petri	43	Head	—	Yugoslavia
23	Frank Petri	19	Son	Chauffeur-Truck Driver	New York
24	Charles Petri	18	Son	Truck Driver	New York
25	Jacob Petri	16	Son	—	New York
26	Hilda Balman	30	Roomer	Stenographer	New York
27	Clarence Schelper	43	Head	Janitor	New York
28	Mary Schelper	53	Wife	—	New York
29	Chester Schelper	25	Son	Radio Service	New York
30	Stanley Schelper	20	Son	Clerk	New York
31	Clyde Schelper	17	Son	—	New York
32	John Cowan THIS PERSON	25	Head	Laborer	New York
33	Virginia Cowan	23	Wife	Attendant	New York
34	John, Jr. Cowan	4	Son	—	New York
35	Mary Cowan	3	Daughter	—	New York
36	Kate R. Dyerley	61	Head	Seamstress	New York
37	Ellen E. Dyerley	85	Mother	—	New York
38	Evelyn F. Dyerley	46	Sister	Post Mistress	New York
39	Norman C. Havens	55	Boarder	Laborer	New York
40	Charles Robert Arty	36	Head	Sales Manager	New York

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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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