Means "tiger" in Turkish. This common Jewish surname has a spelling variation: Caplan. For an unknown reason, Jewish immigrants who passed through the port at Baltimore had their names changed to Caplan, while the Jewish immigrants who passed through Ellis Island retained the original K spelling.
In turkish it's a common surname meaning "tiger".In german it's a surname meaning "priest" derived from the word Kaplan of the same meaning.In yiddish it's a translation of Cohen with the same meaning.