Who have for my life laid down their own necks; i.e. they hazarded their own lives to save mine. The Scripture speaks of this as the duty of Christians, 1 John 3:16. He refers (it may be) to that uproar that was at Corinth, of which see Acts 18:12; or that in Asia, of which see Acts 19:23. Unto whom not only I give thanks, but also all the churches of the Gentiles; because he was the apostle of the Gentiles, and his preservation redounded to the benefit of them all.
Related Commentaries of Romans 16:4
Romans 16:4
4 Who have for my life laid down their own necks: unto whom not only I give thanks, but also all the churches of the Gentiles.