Oliver Hogwilde, called Oliver Gooswon in the original Italian, is a young anthropomorphic pig.
Oliver Hogwilde is a boy the same age as Huey, Dewey and Louie, and he is actually their schoolmate. However, he is also Mayor Hogwilde's son, and, even though he is not really a mean guy most of the time, he sometimes brags quite annoyingly about his father's high social status.
Behind the scenes
He was created in September of 2007 in The Library of Mysteries.
In the English translation of The Library of Mysteries, Oliver oddly kept his Italian family name "Gooswon", even though this was inconsistent with his father's English name, Hogwilde.