Fauntleroy
In the 1942 short "Donald Gets Drafted", Donald's full name is Donald Fauntleroy Duck. However, Donald's birthday is in doubt. It was thought that it was 9 June 1934, the day his debut film, "The Wise Little Hen", was released, but in "The Three Caballeros" (1944), his birthday is given as "Friday the 13th" and his "Happy Birthday" (short) gives his birthday as 13 March.