I.having two names (only in Ov. and in gen. sing.): binominis, cui geminum est nomen, ut Numa Pompilius, Tullus Hostilius, Paul. ex Fest. p. 36 Müll.: “Ascanius (also called Iulus),” Ov. M. 14, 609: “Ister (also called Danubius),” id. P. 1, 8, 11; id. Ib. 415.
bĭnōmĭnis , e, adj. bis-nomen, analog. to cognominis, from con-nomen,