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.
Duck family (Disney)
Dugan Duck is Fethry Duck's nephew who is a little bit younger than Huey, Dewey and Louie. According to the Brazilian comic story "O Nascimento Do Biquinho", he is the first nephew of Fethry, being son of his sister, who lives in the periphery of Duckburg.