Gallio, the proconsul of Achaea, is described in Acts 18:12-17 as allowing Sosthenes to be beaten without trial. Interestingly, Gallio appears to have been the son of Seneca the Elder, and brother of the famed Seneca the Younger the tutor of Nero, as well as the brother of the poet Lucan , all three of whom (Seneca Sr. Seneca Jr. and Lucan) have works extent.
Tacitus says that Gallio was exiled during the reign of Tiberius, then recalled and given house arrest. It is probable that he was released after Tiberius died, which is perhaps how he ended up as proconsul of Achaea during the reign of Claudius.
The Annals 6.3
“Junius Gallio however, who had proposed that the prætorian soldiers, after having served their campaigns, should acquire the privilege of sitting in the fourteen rows of the theatre, received a savage censure. Tiberius, just as if he were face to face with him, asked what he had to do with the soldiers, who ought not to receive the emperor’s orders or his rewards except from the emperor himself? He had really discovered something which the Divine Augustus had not foreseen. Or was not one of Sejanus’s satellites rather seeking to sow discord and sedition, as a means of prompting ignorant minds, under the pretence of compliment, to ruin military discipline? This was Gallio’s recompense for his carefully prepared flattery, with immediate expulsion from the Senate, and then from Italy. And as men complained that he would endure his exile with equanimity, since he had chosen the famous and lovely island of Lesbos, he was dragged back to Rome, and confined in the houses of different officials.”
The Annals 15:73:
“Nero meanwhile summoned the Senate, addressed them in a speech, and further added a proclamation to the people, with the evidence which had been entered on records, and the confessions of the condemned. He was indeed perpetually under the lash of popular talk, which said that he had destroyed men perfectly innocent out of jealousy or fear. However, that a conspiracy was begun, matured, and conclusively proved was not doubted at the time by those who took pains to ascertain the truth, and is admitted by those who after Nero’s death returned to the capital. When every one in the Senate, those especially who had most cause to mourn, abased himself in flattery, Salienus Clemens denounced Junius Gallio, who was terror-stricken at his brother Seneca’s death and was pleading for his life. He called him an enemy and traitor to the State, till the unanimous voice of the senators deterred him from perverting public miseries into an occasion for a personal resentment, and thus importing fresh bitterness into what by the prince’s clemency had been hushed up or forgotten.”