Fanny the Goose

Fanny Coot is the mother of Donald's cousin Gus Goose and she was first mentioned in the Donald Duck comic strip of May 9, 1938 by Bob Karp & Al Taliaferro where Gus first appeared. But Gus's mother's surname wasn't revealed in this comic strip, where she identifies herself in a letter to Donald as Aunt Fanny. So she was originally sister of one of Donald's parents. In Don Rosa's Duck Family Tree she is featured as a daughter of Casey Coot and his wife Gretchen Grebe, and so a niece of Elvira Coot, Donald's paternal grandmother, and first cousin of Donald's father, Quackmore Duck. It's possible to consider that Quackmore had a high regard for his cousin Fanny, and for this reason Donald was taught to treat her as aunt. Fanny also had a brother named Cuthbert Coot and she married Luke the Goose, and then became the mother of Gus Goose.