Thayer's Greek Lexicon

 Gallio = "One who lives on milk"
1. Junius Annaeus Gallio, the Roman proconsul of Achaia when Paul
was at Corinth, 53 A.D., under the emperor Claudius. Acts 18:12. He
was brother to Jucius Annaeus Seneca, the philosopher. Jerome
in the Chronicle of Eusebius says that he committed suicide in
65 A.D. Winer thinks he was put to death by Nero.