John Knapp — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Hartford-County, Connecticut

Our Model Tree links this John Knapp across the 1930 and 1940 US Censuses in Hartford-County, Connecticut (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 8-person household.

Age 47 b. ~1893 Male Head Born: Poland Married

1940 Census Record Details

Census Year	1940
Location	Hartford-County, Connecticut
Surname	Knapp
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Poland
1935 Residence (City)	Southington
1935 Residence (County)	Hartford
Naturalization Status	Naturalized
Additional Details
Occupation	Polisher
Industry	Tool Mfg
Class of Worker	PW
Hours Worked	32
Income (1939)	436
Highest Grade	8
1935 Residence	Connecticut
Birth Country	Poland
Birthplace (normalized)	poland
Occupation	Polisher
Township / Ward	Southington
Est. Birth Year	~1893

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 John	Age	Birth yr
Joseph Knapp	Son	—	20	~1920
Edward Fidziuk	Other	—	27	~1913
Tekla Knapp	Spouse	—	44	~1896
Stanley Knapp	Son	—	18	~1922
John Knapp	Head	—	47	~1893
Jennie Knapp	Daughter	—	15	~1925
Helen Knapp	Daughter	—	11	~1929
Edward Knapp	Son	—	7	~1933

Census Appearances

1930

Hartford, Connecticut

Head, age 37

Hartford, Connecticut · implied b. ~1893 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Knappe
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Poland
Naturalization Status	Naturalized
Year of Immigration	1909
Age at First Marriage	23
Father's Birthplace	Poland
Mother's Birthplace	Poland
Occupation	Polisher
Industry	Factory
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Polish
Home Owned/Rented	No
Home Value / Rent	O
Radio Set	6000
Veteran	Yes
Birth Country	Poland
Birthplace (normalized)	poland

1940

Hartford-County, Connecticut

Head, age 47

Hartford-County, Connecticut · implied b. ~1893 — 8 household members

Surname	Knapp
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Poland
1935 Residence (City)	Southington
1935 Residence (County)	Hartford
Naturalization Status	Naturalized
Occupation	Polisher
Industry	Tool Mfg
Class of Worker	PW
Hours Worked	32
Income (1939)	436
Highest Grade	8
1935 Residence	Connecticut
Birth Country	Poland
Birthplace (normalized)	poland

Model Tree

Linked across censuses

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

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This person

Anchor record

John Knapp

Head · 1940 · age 47 · b. ~1893 · Connecticut

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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 — Hartford-County, Connecticut Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00507-00132)

Line	Name	Age	Relation	Occupation	Birthplace
1	Nicholas Prilla	30	Head	Truck Driver	Italy
2	Ethel S Mckay	43	Head	Housewife	Maine
3	Gertrude Mckay	22	Daughter	Clerk	Maine
4	Mildred Mckay	21	Daughter	Inspector	Maine
5	Anthony Krzysztofa	53	Head	Store	New Britain
6	Stephanie Krzysztofa	45	Wife	Housewife	New Britain
7	Robert Krzysztofa	19	Son	—	New Britain
8	John Krzysztofa	50	Brother	Forger	New Britain
9	Stanley Kowal	44	Head	Forger	Poland
10	Regina Kowal	51	Wife	Housewife	Poland
11	John Knapp THIS PERSON	47	Head	Polisher	Poland
12	Tekla Knapp	44	Wife	Housewife	Poland
13	Joseph Knapp	20	Son	Maker	Southington
14	Stanley Knapp	18	Son	Watcher	Southington
15	Jennie Knapp	15	Daughter	Housekeeper	Southington
16	Helen Knapp	11	Daughter	—	Southington
17	Edward Knapp	7	Son	—	Southington
18	Edward Fidziuk	27	Lodger	Maker	Southington
19	Walter Chludzinski	49	Head	Housewife	Poland
20	Andrew Fidziuk	27	Lodger	Driver	Southington
21	Emily Chludzinski	25	Daughter	—	Southington
22	Harriet Chludzinski	15	Daughter	—	Southington
23	George Chludzinski	12	Son	—	Southington
24	William Koscinski	32	Lodger	Baker	Cleveland
25	Roman Zawisowski	60	Lodger	Baker	Poland
26	Nicholas Rondo	37	Head	Carpenter	Italy
27	Alice Rondo	34	Wife	Housewife	Italy
28	Louise Rondo	15	Daughter	—	Hartford
29	Nicholas Rondo	14	Son	—	Southington
30	Dominic Rondo	12	Son	—	Southington
31	Joseph Del Bone	47	Head	Laborer	Italy
32	Anne Del Bone	48	Wife	Housewife	Italy
33	Pasquale Cusano	17	Son	—	Italy
34	Lena Conetta	62	Wife	Housewife	Italy
35	William Conetta	36	Son	—	Washington
36	Jeremiah Callahan	55	Head	Tool Maker	Berlin
37	Francis Callahan	28	Son	Inspector	Southington
38	Doris Callahan	25	Wife	Housewife	Wallingford
39	Gerald Callahan	12	Son	—	Bristol
40	Martha Nikolas	66	Head	Housewife	Germany

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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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