(4) Allusions to 1 John are made in the writings of
(a) Ignatius of Antioch (date of his writings are uncertain but in early A.D. 100's)
(b) Papias of Hierapolis (born between A.D. 50-60 and martyred about A.D. 155)
(5) Irenaeus of Lyons (A.D. 130-202) attributes 1 John to the Apostle John. Tertullian, an early
apologist who wrote 50 books against heretics, often quoted 1 John
(6) Other early writings which attribute authorship to John the Apostle are Clement, Origen, and Dionysius, all three of Alexandria,
the Muratorian Fragment (A.D. 180-200), and Eusebius (third century).
(7) Jerome (second half of fourth century) affirmed John's authorship but admitted that it was denied by some in his day.
(8) Theodore of Mopsuestia, Bishop of Antioch from A.D. 392-428, denied John's authorship.