I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ.
All Commentaries on Revelation 1:9 Go To Revelation 1
Pseudo-Dionysius the Areopagite
AD 550
"This other author, on the contrary, did not even deem it sufficient to name himself once, and then to proceed with his narrative; but he takes up his name again, and says: "I John, who also am your brother and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos for the Word of God, and for the testimony of Jesus Christ."