Aaronic priesthood Ambrose of Milan Athanasius Barnabas Basil Clement of Alexandria Clement of Rome Cyprian of Carthage Cyril of Jerusalem Gregory of Nyssa Hermas Ignatius Irenaeus Jerome John John Chrysostom Justin Martyr Lactantius Firmianus Luke Mark Melchizedek priesthood Origen Papias Paul Peter Polycarp Seventy Tertullian ante-Nicene Fathers bishop colporteur convert converter deacon disciple elder evangelist follower high priest missionary missioner patriarch priest propagandist proselyte proselyter proselytizer saint teacher