The three little ducks are called Huey Duck (red coat and hat), Dewey Duck (blue coat and hat), and Louie Duck (green coat and hat), also referred to as HD&L .
Brothers: each other.
Father: Unknown.
Mother: Della Duck (Donald Duck's twin sister).
Uncle: Donald Duck, but since "uncle" and "uncle" are the same word in Western languages, China's "Mickey Mouse" magazine translated "uncle" as "uncle".