1.a surname, name given after some person or thing, Lat. cognomen, as Polynices, (from πολύς, νεῖκος), Aesch.; ἐπ. ποιεῖσθαι, θέσθαι to take a surname, Hdt.; καλεῖσθαι ἐπωνυμίην ἐπί τινος after some one, id=Hdt.; ἔχειν ἐπ. ἀπό τινος id=Hdt., Thuc.; ἐπ. σχεῖν χώρας to have the naming of it, i. e. have it named after one, id=Thuc.; with inf. added, ἐπ. ἔχει εἶναί τι he has a name for being, may be said to be, Plat.
2.generally, a name, Hdt.