Hylas

In Greek mythology, Hylas was the son of King Theiodamas of the Dryopians. When Heracles killed his father, he spared Hylas and the pair became great friends. Heracles took him with him on the Argo, making Hylas one of the Argonauts. On this trip, Hylas was kidnapped by a nymph. Heracles, along with Polyphemus, searched for a long time. The ship set sail without them.