The Apostle Paul
Galatians 2:9BSB·traditional attribution

And recognizing the grace that I had been given, James, Cephas, and John—those reputed to be pillars—gave me and Barnabas the right hand of fellowship, so that we should go to the Gentiles, and they to the circumcised.

John Calvin Reformed @genevareformer

9. And when they perceived the grace. They who treated with contempt the grace of God, by which the most eminent apostles had been led to admire and reverence Paul, are charged with hateful and proud disdain. If they should allege that they were ignorant of that which the apostles knew from the beginning, the hypocritical pretense was not to be endured.

Matthew Henry Presbyterian @wholebiblehenry

It should seem, by the account Paul gives of himself in this chapter, that, from the very first preaching and planting of Christianity, there was a difference of apprehension between those Christians who had first been Jews and those who had first been Gentiles.

Commenting on Galatians 2:1-10

John Gill Reformed Baptist @doctorgill

And when James, Cephas, and John,.... These are the persons all along designed, though not till now named. James was the brother of our Lord, the son of Alphaeus, who wrote the epistle that goes by his name, made that famous speech in the synod at Jerusalem, Act 15:13, presided in that church, was a man of great holiness, and much esteemed of by the...