ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)
Gnīpho: ōnis, m.,I a Roman surname: M. Antonius Gnipho, a rhetorician at Rome in the time of Cicero, Quint. 1, 6, 23 al.