James
James 1:1BSB·traditional attribution

James, a servant of God and of the Lord Jesus Christ, To the twelve tribes of the Dispersion: Greetings.

John Calvin Reformed @genevareformer

1 To the twelve tribes. When the ten tribes were banished, the Assyrian king placed them in different parts. Afterwards, as it usually happens in the revolutions of kingdoms (such as then took place,) it is very probable that they moved here and there in all directions. And the Jews had been scattered almost unto all quarters of the world.

Matthew Henry Presbyterian @wholebiblehenry

We have here the inscription of this epistle, which consists of three principal parts. I. The character by which our author desires to be known: James, a servant of God, and of the Lord Jesus Christ. Though he was a prime-minister in Christ's kingdom, yet he styles himself only a servant. Note hence, Those who are highest in office or attainments in the church of Christ are but servants.

John Gill Reformed Baptist @doctorgill

James, a servant of God,.... That is, of God the Father; not by creation only, as every man is; nor merely by calling grace, as is every regenerate person; but by office, as a preacher of the Gospel, being one that served God in the Gospel of his Son, and was an apostle of Christ; nor is this any sufficient objection to his being one...