John Calvin Commentary Romans 16:4

"who for my life laid down their own necks; unto whom not only I give thanks, but also all the churches of the Gentiles:" — Romans 16:4 (ASV)

To whom not only I, etc. Since Prisca and Aquila had not spared their lives to preserve Paul's life, he testifies that he himself was individually thankful to them; he adds, however, that thanks were given to them by all the Churches of Christ, and he added this so that he might, by such an example, influence the Romans. The life of such a man was deservedly dear and precious to all the Gentiles, as it was an incomparable treasure; it was therefore no wonder that all the Churches of the Gentiles considered themselves indebted to his preservers.

What he adds concerning the Church in their house is noteworthy; for he could not have adorned their household more splendidly than by giving it the title of a Church. I do not approve of the word congregation, which Erasmus has adopted, for it is plainly evident that Paul, as a mark of honor, had used the sacred name of Church.