The Apostle Paul
Romans 11:13ESV·traditional attribution

Now I am speaking to you Gentiles. Inasmuch then as I am an apostle to the Gentiles, I magnify my ministry

John Calvin Reformed @genevareformer

13. For to you Gentiles I speak, etc. He confirms by a strong reason, that nothing shall be lost by the Gentiles, were the Jews to return again to favor with God; for he shows, that the salvation of both is so connected, that it can by the same means be promoted.

Matthew Henry Presbyterian @wholebiblehenry

The apostle proposes here a plausible objection, which might be urged against the divine conduct in casting off the Jewish nation (Rom 11:1): "Hath God cast away his people? Is the rejection total and final? Are they all abandoned to wrath and ruin, and that eternal?

Commenting on Romans 11:1-32

John Gill Reformed Baptist @doctorgill

For I speak to you Gentiles,.... The church at Rome, as the primitive churches for the most part did, consisted of Jews and Gentiles; hence the apostle sometimes addresses the one, as in Rom 2:17, and sometimes the other, as here; and this he does to observe unto them the grace and goodness of God, in enriching them with the Gospel of salvation; and that...