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- [S7] 1940 US Census.
Source: U.S. WWII Draft Cards Young Men, 1940-1947 Joseph Frederick Knott | b: 26 Feb 1917 (Davis Junction, Ill.) | Employer: Edward Hoch | Next of kin: Gottfred Knott (father)
- [S15] Internet.
Source: Rockford, Illinois, City Directory, 1944 Knott Jos F (Betty L) mach B-Cco h1511 Meadow ct
- [S9] Social Security Death Index.
Name: Joseph Fredrick Knott Birth: 26 Feb 1917 (Ogle Co., Illinois) Death Date: 19 Mar 2002 Father: Gottfred Knott Mother: Gertrude L Wiley SSN: 348071684 Notes: Feb 1937: Name listed as JOSEPH FREDRICK KNOTT; 22 Mar 2002: Name listed as JOSEPH F KNOTT
- [S5] Find A Grave, → Memorial ID 91844716.
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