| Sources  | 
- [S64]  Missouri Bureau of Vital Records, Missouri Secretary of State, Missouri -- Death Certificates 1910-1974, (https://s1.sos.mo.gov/Records/Archives/ArchivesMvc/ :n.d.), 3 Nov 2023, death certificate 31930 (1941), William Karl Knechtenhofer, accessed 02 Nov 2023. 
 
  
- [S64]  Missouri Bureau of Vital Records, Missouri Secretary of State, Missouri -- Death Certificates 1910-1974, (https://s1.sos.mo.gov/Records/Archives/ArchivesMvc/ :n.d.), 3 Nov 2023, death certificate 18218 (1923), Susanna Knechtenhofer, accessed 03 Nov 2023. 
 
  
- [S265]  Saint John's Church Cemetery (Andrew County, Missouri), Missouri, Andrew County -- Saint John's Church Cemetery (PACT), 3 Nov 2023, Frederick and Susanna Knechtenhofer  marker, photographed by the PACT project. 
 
  
- [S445]  New York, New York -- Passenger Lists, 1820-1891, (FamilySearch. https://www.familysearch.org/search/collection/1849782 : 2022), 4 Nov 2023, "New York Passenger Lists, 1820-1891" (https://www.familysearch.org/search/collection/1849782 : accessed 04 Nov 2023), manifest, Normandie, 20 April 1885, Christian Ogi. 
  
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