Every immigrant relative I know of, all from Russia, switched to Americanized names once they came to the USA.  That led to a funny exchange with my father thirty years ago.  I said: "Dad, I found several people with the right (grand)father, but their names are not familiar."  Dad:"What names did you find?" Me: "One was Dina Rive." Dad: "Oh, that's my Aunt Tillie."  That's how I learned to ask for Hebrew/Yiddish names as well as American names. 
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Barbara Sloan
Conway, SC