THYESTES (Θυέστης), a son of Pelops and Hippodameia, was the brother of Atreus and the father of Aegisthus. (Hom. Il. ii. 107; Aeschyl. Agam. 1242; Eurip. Or. 1008; comp. Atreus; Pelops; Agamemnon.) [L. S.]