Nyctimus

Nyctimus was a son of the former king of Arcadia, Lycaon. Unlike his father, or his many siblings, Nyctimus never became a werewolf and lived a human life. After Zeus banished Lycaon and Lycaon's children, he made Nyctimus the new king of Arcadia.

History
Nyctimus was a son of the former king of Arcadia, Lycaon. When Nyctimus was 21, he was killed and served up as part of a feast to Zeus; and was later brought back to life, by Zeus. After he was resurrected, Zeus gave Nyctimus and all of his descendants immunity to werewolf venom. Zeus also then banished Lycaon and all of Nyctimus' siblings, before crowning Nyctimus the new king of Arcadia.