In Greek mythology, Pelasgus was the eponymous ancestor of the Pelasgians, the mythical inhabitants of Greece who established the worship of the Dodonaean Zeus, Hephaestus, the Cabeiri, and other divinities. In the different parts of the country once occupied by Pelasgians, there existed different traditions as to the origin and connection of Pelasgus. Some ancient Greeks believed that he was the first man.