Lewis & Short

Xerxes (Xerses, Cic. Leg. 2, 10, 26), is (i, Nep. Reg. 1), m., = Ξέρξης, the celebrated king of Persia, son of Darius Hystaspis, vanquished by the Greeks at Salamis, Cic. Tusc. 5, 7, 20; id. N. D. 1, 41, 115.