And when Gallio was the deputy of Achaia, the Jews made insurrection with one accord against Paul, and brought him to the judgment seat, When Gallio was the deputy of Achaia - The Romans comprehended, under the name of Achaia, all that part of Greece which lay between Thessaly and the southernmost coasts of Peloponnesus. Pausanias, in Attic. vii. 16, says that the Romans were accustomed to send a governor into that country, and that they called him the governor of Achaia, not of Greece; because the Achaeans, when they subdued Greece, were the leaders in all the Grecian affairs see also Suetonius, in his life of Claudius, cap. xxv., and Dio Cassius, lx. 24. Edit. Reimari.
Deputy - Ανθυπατευοντος, serving the office of Ανθυπατος, or deputy: see the note on Acts 13:7.
Gallio - This deputy, or proconsul, was eldest brother to the celebrated Lucius Annaeus Seneca, the stoic philosopher, preceptor of Nero, and who is so well known among the learned by his works. The name of Gallio, was at first Marcus Annaeus Novatus; but, having been adopted in the family of Gallio, he took the name of Lucius Junius Gallio. He, and Annaeus Mela his brother, father of the poet Lucan, shared in the disgrace of their brother Seneca; and by this tyrant, Nero, whose early years were so promising, the three brothers were put to death; see Tacitus, Annal. lib. xv. 70, and xvi. 17. It was to this Gallio that Seneca dedicates his book De Ira. Seneca describes him as a man of the most amiable mind and manners: "Quem nemo non parum amat, etiam qui amare plus non potent; nemo mortalium uni tam dulcis est, quam hic omnibus: cum interim tanta naturalis boni vis est, uti artem simulationemque non redoleat:" vide Senec. Praefat. ad Natural. Quaest. 4. He was of the sweetest disposition, affable to all, and beloved by every man.
Statius, Sylvar. lib. ii. 7. ver. 30, Ode on the Birthday of Lucan, says not a little in his favor, in a very few words: -
Lucanum potes imputare terris;
Hoc plus quam Senecam dedisse mundo,
Aut dulcem generasse Gallionem.
You may consider nature as having made greater efforts in producing Lucan, than it has done in producing Seneca, or even the amiable Gallio.
And brought him to the judgment seat - They had no power to punish any person in the Roman provinces, and therefore were obliged to bring their complaint before the Roman governor. The powers that be are ordained of God. Had the Jews possessed the power here, Paul had been put to death!