A / Aegisthus
noun

Aegisthus

gen. Aegisthi · gender masculine · decl. 2nd
= Αἴγισθος
the son of Thyestes; who murdered Atreus and Agamemnon; with whose wife
the son of Thyestes, who murdered Atreus and Agamemnon, with whose wife, Clytœmnestra, he lived in incest, and was finally slain by Orestes, Cic. N. D. 3, 38; Ov. R. Am. 161.— Hence, Pompey called Cæsar Ægisthus, on account of his adulterous connection with Mucia, Suet. Caes. 50.