What was the name of the centurion in charge of Paul on the voyage to Italy?

Answer: Julius

Paul was handed over to a centurion named Julius, who later stopped the soldiers from killing the prisoners to spare Paul.

“When it was decided that we would sail for Italy, Paul and some other prisoners were handed over to a centurion named Julius, who belonged to the Imperial Regiment. But the centurion, wanting to spare Paul’s life, thwarted their plan. He commanded those who could swim to jump overboard first and get to land.”— Acts 27:1, 27:43 (BSB)