The Apostle Paul
Romans 16:4BSB·traditional attribution

who have risked their lives for me. Not only I but all the churches of the Gentiles are grateful to them.

John Calvin Reformed @genevareformer

4. To whom not only I, etc. As Prisca and Aquila had not spared their life for preserving the life of Paul, he testifies that he himself was individually thankful to them: he however adds, that thanks were given them by all the Churches of Christ; and he added this that he might, by such an example, influence the Romans.

Matthew Henry Presbyterian @wholebiblehenry

Such remembrances as these are usual in letters between friends; and yet Paul, by the savouriness of his expressions, sanctifies these common compliments. I. Here is the recommendation of a friend, by whom (as some think) this epistle was sent - one Phebe, Rom 16:1, Rom 16:2.

Commenting on Romans 16:1-16

John Gill Reformed Baptist @doctorgill

Who for my life laid down their necks,.... That is, exposed themselves to great danger to save the apostle's life: the allusion is to the manner of executions by beheading, and to one person's laying down his head, and offering his neck to the executioner the room of another: this we are not to suppose was literally done; but the design of the expression is...