Lewis & Short

Cassandra (acc. to Quint. 1, 4, 16; cf. Alexanter; in the most ancient period written in the Etruscan manner, Cassantra), ae, f., = Κασσάνδρα, a daughter of Priam and Hecuba, who continually proclaimed the approaching evil, but was believed by no one. After the destruction of Troy she became the bondmaid of Agamemnon, and was murdered with him by Clytœmnestra, Cic. Div. 1, 39, 85; Verg. A. 2 404; 2, 246 Serv.; 3, 187; 5, 636; Ov. H. 16, 119; Hyg. Fab. 93 and 117.