The Apostle Peter
1 Peter 1:2ESV·traditional attribution

according to the foreknowledge of God the Father, in the sanctification of the Spirit, for obedience to Jesus Christ and for sprinkling with his blood: May grace and peace be multiplied to you.

Matthew Henry Presbyterian @wholebiblehenry

In this inscription we have three parts: - I. The author of it, described, 1. By his name - Peter. His first name was Simon, and Jesus Christ gave him the surname of Peter, which signifies a rock, as a commendation of his faith, and to denote that he should be an eminent pillar in the church of God, Gal 2:9. 2.

Commenting on 1 Peter 1:1-2

John Gill Reformed Baptist @doctorgill

Elect according to the foreknowledge of God the Father,.... Not to any office, as to that of bishops or presbyters; for though the apostle writes to some of them under this character, Pe1 5:1 yet not all; nor were they so called, as a nation, for they were persons scattered about in several countries; nor as a church, for they are not wrote to as...

Albert Barnes Presbyterian @notesbybarnes

Remainder of Introductory Notes and Notes on 1 Peter Verses 1 and 2 III.---THE CHARACTERISTICS OF THE FIRST EPISTLE OF PETER. (1.) THE epistles of Peter are distinguished for great tenderness of manner, and for bringing forward prominently the most consolatory parts of the gospel.