Lewis & Short

Nīcŏpŏlītānus, a, um, adj., of or belonging to Nicopolis, Nicopolitan: civitas, Plin. 4, 1, 2, § 5.
Nīcŏpŏlītāni, ōrum, m., the Nicopolitans, in Lower Moesia, Inscr. Grut. 527, 7.