Deleon \d(e)-leon\ as a boy's name is a variant of De- (American). See for meaning of Deleon. The baby name Deleon sounds like Delon, Dalen, Dalon, Dallon, Delwyn, Delwin, Dillon, Dylon, Dyllon and Dilon. Other similar baby names are Delton, Delmon, Delron, Delvon and Deveon.