William Knapp — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Monroe-County, Michigan

Our Model Tree links this William Knapp across the 1930 and 1940 US Censuses in Monroe-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 6-person household.

Age 64 b. ~1876 Male Head Born: Michigan Married

1940 Census Record Details

Census Year	1940
Location	Monroe-County, Michigan
Surname	Knapp
Given Name	William S.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	64
Marital Status	Married
Birthplace	Michigan
1935 Residence (City)	Monroe City
1935 Residence (County)	Monroe
Additional Details
Occupation	Merchant
Industry	Stoker Co.
Class of Worker	OA
Hours Worked	40
Income (1939)	1800
Highest Grade	8
1935 Residence	Same place
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan
Occupation	Merchant
Township / Ward	Monroe City
Est. Birth Year	~1876

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.

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

Name	Relation to head	Relative to William	Age	Birth yr
Charles Knapp	Son	—	13	~1927
Arlinton Knapp	Son	—	18	~1922
Maxine Knapp	Daughter	—	21	~1919
William Knapp	Head	—	64	~1876
Kenneth Knapp	Son	—	14	~1926
Lottie Knapp	Spouse	—	52	~1888

Census Appearances

1930

Monroe, Michigan

Head, age 53

Monroe, Michigan · implied b. ~1877 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Knapp
Given Name	William S
Relationship to Head	Head
Sex	M
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Michigan
Age at First Marriage	21
Father's Birthplace	Germany
Mother's Birthplace	Michigan
Occupation	Merchant
Industry	Furniture
Class of Worker	O
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	20000
Radio Set	R
Veteran	No
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

1940

Monroe-County, Michigan

Head, age 64

Monroe-County, Michigan · implied b. ~1876 — 6 household members

Surname	Knapp
Given Name	William S.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	64
Marital Status	Married
Birthplace	Michigan
1935 Residence (City)	Monroe City
1935 Residence (County)	Monroe
Occupation	Merchant
Industry	Stoker Co.
Class of Worker	OA
Hours Worked	40
Income (1939)	1800
Highest Grade	8
1935 Residence	Same place
Birth State	Michigan
Birth Country	United States
Birthplace (normalized)	michigan

Model Tree

Linked across censuses

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

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This person

Anchor record

William Knapp

Head · 1940 · age 64 · b. ~1876 · 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 — Monroe-County, Michigan Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01792-00076)

Line	Name	Age	Relation	Occupation	Birthplace
1	Wayne Snyder	18	Son	School	Michigan
2	Alton Snyder	17	Son	School	Michigan
3	Sebastian W. Ferrer	65	Head	Proprietor	Michigan
4	Ora Ferrer	65	Wife	—	Michigan
5	William Ferrer	40	Son	Clerk	Michigan
6	Mary Jane Ferrer	26	Daughter	Dept-Keeper	Michigan
7	Patricia J. Ferrer	14	Daughter	School	Michigan
8	William E. Ferrer	16	Son	School	Michigan
9	Elizabeth E. Denny	63	Head	Gyp U.W.	Michigan
10	Annetta E. Heile	24	Lodger	Laborer	Michigan
11	Walter P. Waxel	22	Lodger	Assist Manag.	Ohio
12	Eliza Dusseau	60	Head	—	Michigan
13	Iona Dusseau	18	Niece	Waitress	Ohio
14	Josephine Schraeffer	62	Head	—	Michigan
15	Mary John Schraeffer	48	Daughter	—	Michigan
16	Edward A. Killinger	66	Head	Painter	Michigan
17	Irene M. Killinger	62	Wife	Toys Dress	Michigan
18	Forest E.A.B. Killinger	26	Son	—	Michigan
19	Charles Sner	27	Head	Collector	Texas
20	Edrie Sner	21	Wife	Folder	Michigan
21	William S. Knapp THIS PERSON	64	Head	Merchant	Michigan
22	Lottie Knapp	52	Wife	—	Michigan
23	Maxine Knapp	21	Daughter	Stenographer	Michigan
24	Arlinton O. Knapp	18	Son	Proprietor	Michigan
25	Kenneth Knapp	14	Son	School	Michigan
26	Charles Knapp	13	Son	School	Michigan
27	George Zimmerman	26	Head	Back-Tender	Pennsylvania
28	Thelma Zimmerman	27	Wife	—	Indiana
29	Lois Zimmerman	5	Daughter	—	Michigan
30	Yvonne Zimmerman	4	Daughter	—	Michigan
31	George W.A. Armstrong	68	Head	Retired	Indiana
32	May W. Armstrong	64	Wife	—	Illinois
33	Clarence W. Armstrong	36	Son	Paper Maker	Indiana
34	Leo Gaylord	26	Head	Cutter	Tennessee
35	Genevieve Gaylord	23	Wife	—	Michigan
36	Sharon Dee Gaylord	1	Daughter	—	Michigan
37	Daniel Rintz	34	Head	Police, Ind.	Ohio
38	Elsie Rintz	33	Wife	—	Pennsylvania
39	Russell Rintz	13	Son	—	Pennsylvania
40	Daniel Jr. Rintz	7	Son	—	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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