I.a Thessalian prince, brother of king Pelias, and father of Jason, who, according to fable, was in extreme old age transformed by the magic arts of Medea into a youth, Ov. M. 7, 2.— Whence,
I. Aesŏnĭdes , ae, patr. m., = Αἰσονίδης, a male descendant of Æson, i. e. Jason, Ov. M. 7, 164: “Phasias Aesoniden, Circe tenuisset Ulixem,” id. A. A. 2, 103: “mobilis Aesonide,” id. H. 6, 109 al.—