Frederick was born in 1897. He passed away in 1938.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KZVX-8NP : 24 December 2021), Fred Koontz, 1917-1918.
California, U.S., Index to Census Roll of Indians, 1928-1933 https://www.ancestry.com/imageviewer/collections/61006/images/44715_355939-00372?treeid=&personid=&hintid=&usePUB=true&usePUBJs=true&_ga=2.200503534.1713695887.1648484977-164021683.1648484977&pId=11029
"California Death Index, 1905-1939," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKS9-7Y32 : 23 February 2021), Fred B Koontz, 1938; citing 14673, Department of Health Services, Vital Statistics Department, Sacramento; FHL microfilm 1,686,049.
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