Lewis & Short

Ŏlȳbrius (Ōlybrius, Anth. 2, p. 287), ĭi, m., the surname of several Roman consuls. To one of them, the consul Anicius Olybrius, is addressed a poem of Claudian.
Hence, Olȳbrĭăcus, a, um, adj., Olybrian: genus et nomen, Prud. ap. Symm. 1, 556.