Donald Duck universe
Donald Duck and his maternal uncle Scrooge McDuck received nearly equal exposure in comics. Other primary characters include Donald's three young nephews Huey, Dewey, and Louie, and girlfriend Daisy Duck.
Huey, Dewey, and Louie
One story in Donald Duck comics was based around Donald spending so much time trying to tell his three nephews apart that he developed a heightened sense of sight.