An important witness for the apostolic authorship of Revelation has more recently come from the Gnostic materials discovered in 1945 at Chenoboskion in Upper Egypt. One of the documents is the Apocryphon of John, which cites Revelation 1:19+ and claims to be written by “John, the brother of James, these who are sons of Zebedee.” Helmbold cites authorities who date the Apocryphon as early as the end of the first century and notes that in any event it cannot be given a date much later than about AD 150.2
1 “The first opposition to its apostolicity came from the Alogi (ca. A.D. 170), who opposed the Logos doctrine of the Fourth Gospel and therefore rejected all Johannine literature. The Alogi therefore testify indirectly to the Johannine tradition and to the tradition that the Gospel and Revelation came from the same hand.”—G. E. Ladd, “Revelation, Book of,” in Geoffrey W. Bromiley, ed., International Standard Bible Encyclopedia (Grand Rapids, MI: William B. Eerdmans Publishing Co., 1979, 1915), 4:172.
2 Robert H. Mounce, The Book of Revelation (Grand Rapids, MI: William B. Eerdmans Publishing Co., 1977), 28.