Festus Copy link Outline I. Sex. Pompeius Festus, a Roman grammarian of the fourth century A. D. ...II. Portius Festus, Governor of the Roman Province of Judea, ... • Festus, i, m., a Roman surname. I. Sex. Pompeius Festus, a Roman grammarian of the fourth century A. D., author of a lexicographical work, De verborum significatione, in twenty books, of which only the last nine, in a very imperfect form, remain to us; with an abstract of the whole compiled by Paulus Diaconus in the eighth century. (Edited by Ottfr. Müller.)— II. Portius Festus, Governor of the Roman Province of Judea, Vulg. Acts, 25, 32 al.