ISB ~ Acts 13 v9

also called Paul:Like numerous Jews in the NT period, the apostle had both a Roman (“Paul”) and a Semitic (“Saul”) name (1:23; 12:12; 13:1). Except when Saul recounts his conversion (22:7; 26:14), he is hereafter called Paul throughout Acts and the rest of the NT. Some hold that this permanent switch to Paul’s Roman name is linked with the conversion of the Roman governor, Sergius Paulus (13:7).