Donald Duck and the Gorilla
Donald Duck and the Gorilla is a Donald Duck short adventure disaster and monster film which was originally released in 1944. It stars Donald Duck along with his three nephews; Huey, Dewey and Louie and Ajax, the killer gorilla. The 1930 Mickey Mouse cartoon "The Gorilla Mystery" has a similar plot involving a gorilla named Beppo who captures Minnie Mouse.
Duck family (Disney)
Don Rosa's Duck Family Tree states that Whitewater's real name is Abner, and "Whitewater" is a nickname. He is also shown to be a son of Eider Duck and Lulubelle Loon and Fethry Duck's brother, making him Donald's first cousin.