Festus (noun M) :
* A Roman surname.
* 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.)
* Portius Festus, Governor of the Roman Province of Judea, Vulg. Acts, 25, 32 al.

Male Personal name
Confirmed occurences in the Roman Empire:

• Aelius Festus Aphthonius (Masc), ref: PIR A 0175 | PIR ID756
• C. Calpetanus Rantius Quirinalis Valerius Festus (Masc, senator), ref: PIR1 C 0184 | PIR ID3388
• Cassius Festus (Masc), ref: PIR C 0493 | PIR ID3719
• L. Coelius Festus (Masc, senator), ref: PIR C 1243 | PIR ID4709
• ... Festus (Masc, senator), ref: PIR F 0150 | PIR ID5841
• Festus (Masc), ref: PIR F 0146 | PIR ID5842
• Festus (Masc), ref: PIR F 0147 | PIR ID5843
• Festus (Masc), ref: PIR F 0148 | PIR ID5844
• Festus (Masc), ref: PIR F 0149 | PIR ID5845
• Festus (Masc), ref: PIR F 0151 | PIR ID5846
• Furius Festus (Masc), ref: PIR F 0579 | PIR ID6445
• Geminius Festus (Masc, eques), ref: PIR G 0145 | PIR ID6657
• Iulius Festus (Masc, senator), ref: PIR I 0307 | PIR ID7494
• Tib. Iulius Festus (Masc, senator), ref: PIR I 0308 | PIR ID7495
• ... Iulius Festus (Masc, eques), ref: RE Suppl. 15 (1978) 123 s.v. Iulius 228a | PIR ID7496
• L. Lucilius Festus (Masc), ref: PIR L 0383 | PIR ID8537
• Marcius Festus (Masc, eques), ref: PIR M 0233 | PIR ID8907
• Marcius Festus (Masc), ref: PIR M 0234 | PIR ID8908
• M. Marius Festus Caecilianus (Masc, eques), ref: PIR M 0300 | PIR ID8975
• L. Pedanius Secundus Pompeius Festus Munatianus (Masc, senator), ref: PIR P 0204 | PIR ID10207
• Pescennius Festus (Masc, senator), ref: PIR P 0249 | PIR ID10257
• Pescennius Festus (Masc), ref: PIR P 0250 | PIR ID10258
• Sex. Pompeius Festus (Masc), ref: PIR P 0607 | PIR ID10684
• Porcius Festus (Masc, eques), ref: PIR P 0858 | PIR ID10951
• M. Postumius Festus (Masc, senator), ref: PIR P 0886 | PIR ID10984
• C. Praecellius Augurinus Vettius Festus Crispinianus Vibius Verus Cassianus (Masc, senator), ref: PIR P 0919 | PIR ID11012
• L. Publicius Festus (Masc), ref: XV 8423 | PIR ID11155
• Q. Ranius Terentius Honoratianus Festus (Masc, senator), ref: PIR R 0025 | PIR ID11355
• ...rius ... Priscus ...lius Festus (Masc, senator), ref: PIR P 0973 | PIR ID11418
• Rufius Festus (Masc, senator), ref: PIR R 0155 | PIR ID11533
• C. Rufius Festus (Masc, eques), ref: PIR R 0156 | PIR ID11534
• C. Rufius Festus Laelius Firmus (Masc, senator), ref: PIR R 0157 | PIR ID11535
• Titus Flavius Festus (Masc, senator), ref: PIR F 0267 | PIR ID13230
• Valerius Festus (Masc, senator), ref: PIR V1 0050 | PIR ID13827
• Valerius Priscus Coelius Festus (Masc, senator), ref: RE Suppl. 14 (1974) 821 s.v. Valerius 314a | PIR ID13944