Pseudo-Chrysostom — as excerpted in the Catena Aurea on Matthew 1:1

“(Homil. in Matt. Hom. i.) Matthew wrote for the Jews, and in Hebrewa; to them it was unnecessary to explain the divinity which they recognized; but necessary to unfold the mystery of the Incarnation. John wrote in Greek for the Gentiles who knew nothing of a Son of God. They required therefore to be told first, that the Son of God was God, then that this Deity was incarnate.”