Pŏlybĭus (noun M) : Πολύβιος
* A celebrated Greek historian from Megalopolis, in Arcadia, the son of Lycortas and friend of the younger Scipio Africanus, Cic. Rep. 1, 21, 34; 2, 14, 27; 4, 3, 3; id. Off. 3, 32, 113; Liv. 30, 45.

Male Personal name
Confirmed occurences in the Roman Empire:

• C. Iulius Polybius (Masc), ref: PIR I 0475 (= P1 0426) | PIR ID7688
• Polybius (Masc), ref: PIR P 0558 | PIR ID10601
• Polybius (Masc), ref: Luc. Dem. 40 | PIR ID10602