Duck family (Disney)
Huey, Dewey, and Louie Duck are Donald's three nephews and identical triplet sons of Della Duck and an unnamed father.
Duck family (Disney)
In his second appearance in "Smarter Than The Toughies" (2004) by Lars Jensen and Daniel Branca, Whitewater is the nephew of Scrooge McDuck's cousin Douglas, making him Donald's second cousin.