(Darius Codomannus) (kdmn??s) (KEY) , d. 330 B.C., king of ancient Pers ia (336-330 B.C.). A cousin of Artaxerxes III, he was raised to the thro ne by the eunuch Bagoas, who had murdered both Artaxerxes and his son, A rses; Darius in turn murdered Bagoas. .