Lewis Short
(adjective) : bĭnōmĭnis, e, bis-nomen, analog. to cognominis, from con-nomen
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary