Daisy Duck Once Upon a Christmas", "Mickey's Twice Upon a Christmas", and "". According to the unofficial timeline of Don Rosa, Daisy was born in 1920. According to Rosa, Daisy is the sister of Donald's brother-in-law – Daisy's brother had married Donald's twin sister, Della Duck, and together, the two became the parents of Huey, Dewey, and Louie Duck. This is his explanation of why the triplets tend to call her "Aunt Daisy" while no such courtesy is given to Gladstone Gander for example. Don Rosa has said that he considers Donald and Daisy to be nonrelated and that Duck simply is
Donald Duck "Donald Duck Finds Pirate Gold". The new publisher meant new illustrators, however, Carl Barks and Jack Hannah would later repeat the treasure-hunting theme in many more stories. Barks soon took over the major development of the duck as both writer and illustrator. Under his pen, Donald became more adventurous, less temperamental and more eloquent. Pete was the only other major character from the "Mickey Mouse" comic strip to feature in Barks' new Donald Duck universe. Barks placed Donald in the city of Duckburg, which he populated with a host of supporting players, including Neighbor Jones (1944), Uncle Scrooge McDuck (1947),