hi there my paternal grandpa is dwain mendenhall. he had two brothers that i only know as being named jerry and gene. he has 2 sisters wanda and phyllis. his parents names were ted and bertha. mygrandpa raised my father and siblings in oregon. wondering if the billy gene u were wondering about is the same as my grandpas brother gene mendenhall. Gene passed away as did Jerry. Not sure of dates or locations though.