Aethlius was, in
Greek mythology, the first king of
Elis, father of
Endymion. He was the son of
Zeus and
Protogeneia (daughter of
Deucalion), and was married to
Calyce. According to some accounts, Endymion was himself a son of Zeus and first king of Elis. Other traditions again made Aethlius a son of
Aeolus, who was called by the name of Zeus.