Fanny Coot is a fictional character of the Scrooge McDuck universe. She was first mentioned in the Donald Duck comic strip of May 9, 1938 where Gus Goose first appeared. She is Gus's mother and Donald Duck's father's cousin. 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. She also had a brother named Cuthbert Coot. Fanny married Luke the Goose and so became the mother of Gus Goose. She lives in Gooseburg another city of Calisota of some distance to Duckburg.