Lībĕrālis | Lībĕrālĭa, ĭum (noun N) :
* Adj., of or belonging to Liber or Bacchus: ludi, a festival in honor of Bacchus, = Liberalia (v. infra), Naev. ap. Paul. ex Fest. p. 116 Müll.—Hence, subst.: , , n., a festival in honor of Liber, celebrated on the 17th of March, the day on which youths received the manly toga, Ov. F. 3, 713: Liberalium dies, a pontificibus agonium martiale appellatur,Macr. S. 1, 4, § 15: sacra,id. ib. 1, 18, § 22; Calend. Maff. ap. Inscr. Orell. II. p. 411: Liberalia tu accusas,Cic. Att. 14, 10, 1: Liberalibus litteras accepi tuas,id. Fam. 12, 25, 1.—Called also: ludi Liberales: Liberalia Liberi festa, quae apud Graecos dicuntur Διονύσια. Libera lingua loquemur ludis Liberalibus, Naev. ap. Paul. ex Fest. p. 116 Müll.; Com. Rel. v. 113 Rib.

Male Personal name
Confirmed occurences in the Roman Empire:

• Aebutius Liberalis (Masc), ref: PIR A 0111 | PIR ID619
• P. Aelius Liberalis (Masc), ref: PIR A 0209 | PIR ID803
• M. Antonius Liberalis (Masc), ref: PIR A 0848 | PIR ID1615
• Antonius Liberalis (Masc), ref: RE 1, 2572 s.v. Antonius 17 | PIR ID1616
• Ti. Claudius Liberalis Aebutianus (Masc), ref: PIR C 0911 | PIR ID4343
• Flavius Liberalis (Masc), ref: PIR F 0302 | PIR ID6127
• P. Iulius Liberalis (Masc), ref: AE 1980, 955 | PIR ID7576
• Liberalis (Masc, senator), ref: PIR L 0163 | PIR ID8276
• Pompeius Liberalis (Masc), ref: PIR P 0621 | PIR ID10698
• L. Pomponius Liberalis (Masc, senator), ref: PIR P 0729 | PIR ID10821
• C. Salvius Liberalis Nonius Bassus (Masc, senator), ref: PIR S 0138 | PIR ID11811
• M. Sempronius Liberalis (Masc, eques), ref: PIR S 0358 | PIR ID12076
• M. Tullius Liberalis (Masc), ref: III 13622 | PIR ID13356
• M. Varenius Liberalis (Masc), ref: XV 7562 | PIR ID14025
• M. Vibius Liberalis (Masc, senator), ref: PIR V1 0385 | PIR ID14374