John the Apostle
John 1:45ESV·traditional attribution

Philip found Nathanael and said to him, “We have found him of whom Moses in the Law and also the prophets wrote, Jesus of Nazareth, the son of Joseph.”

John Calvin Reformed @genevareformer

45. Philip findeth Nathanael. Though proud men despise these feeble beginnings of the Church, yet we ought to perceive in them a brighter display of the divine glory, than if the condition of the Kingdom of Christ had been in every respect, from the outset, splendid and magnificent; for we know to how rich a harvest this small seed afterwards grew.

Matthew Henry Presbyterian @wholebiblehenry

We have here the call of Philip and Nathanael. I. Philip was called immediately by Christ himself, not as Andrew, who was directed to Christ by John, or Peter, who was invited by his brother. God has various methods of bringing his chosen ones home to himself. But, whatever means he uses, he is not tied to any. 1. Philip was called in a preventing was: Jesus findeth Philip.

Commenting on John 1:43-51

John Gill Reformed Baptist @doctorgill

Philip findeth Nathanael,.... Who was of Cana of Galilee, Joh 21:2 and where, it is very likely, Philip found him; since we quickly read of Jesus, and his disciples being there. This man is thought, by some, to be the same with Bartholomew; and so he is called Bartholomew, in a Syriac dictionary (o); and the rather, since he and Philip are always mentioned together...