Lewis & Short

Zētes, ae, m., = Ζήτης, a brother of Calăis and son of Boreas, one of the Argonauts, Ov. M. 6, 716; Prop. 1, 20, 26.
Collat. form Zētus, i, n., Serv. ad Verg. A. 10, 350.