Concise Bible Dictionary:

The centurion of “Augustus’ band” who had custody of Paul in traveling to Rome. He treated Paul with great courtesy, allowing him to visit his friends at Sidon and refresh himself. Paul counseled him as to where they should winter, but he naturally was swayed by the master of the ship, though it proved afterward that it would have been wiser to have listened to the man of God, who, though a prisoner, could tell them that God had given him all that sailed in the ship, and that all would be saved. When the shipwreck occurred, Julius would not allow the prisoners to be put to death because he was desirous of saving Paul. God was watching over His servant, and turned the heart of Julius towards him (Acts 27:1, 3, 431And when it was determined that we should sail into Italy, they delivered Paul and certain other prisoners unto one named Julius, a centurion of Augustus' band. (Acts 27:1)
3And the next day we touched at Sidon. And Julius courteously entreated Paul, and gave him liberty to go unto his friends to refresh himself. (Acts 27:3)
43But the centurion, willing to save Paul, kept them from their purpose; and commanded that they which could swim should cast themselves first into the sea, and get to land: (Acts 27:43)

Strong’s Dictionary of Greek Words:

of Latin origin; Julius, a centurion
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

downy: hairy

Potts’ Bible Proper Names:

Curled; frizzled; soft-haired; downy:―a Roman centurion, Acts 27:1. {Crispus}