Bishop of Alexandria from about 283 to 301 (Eusebius, "Chronicle", Ann. Abr. 2299, St. Jerome's version). In his time Achillas, who had been appointed presbyter at Alexandria, at the same time with Pierius, became celebrated (Eusebius, Church History III.32). The celebrated letter of Theonas to Lucianus, chamberlain to Diocletian, which has often been quoted as giving such a lifelike description of the position of a Christian in the imperial Court has been pronounced, first by Batiffol and then by Harnack, to be a forgery. Their verdict is endorsed by Bardenhewer. It was first published from what purported to be a transcript made by Jérôme Vignier, by Dacherius in his "Spicilegium". Theonas is commemorated in the Roman Martyrology on 27 August. St. Athanasius in his apology to Constantinus speaks of a church dedicated by his predecessor, St. Alexander, to Theonas. The same church is alluded to in the "Act of SS. Pachomius and Theodorus".
For the Epistle to Lucianus see: BATIFFOL, Bulletin Critique (1886), 155-60; HARNACK, Der gefalschte Brief des Bischofs Theonas in Texte u. Untersuchungen, IX (Leipzig, 1903), iii, new series, English tr. of epistle in CLARKE, Ante-Nicene Fathers: The Writings of Methodius etc. For a number of fabulous stories told by medieval Arabic writers (SEVERUS, EUTYCHIUS, etc.) see RENAUDOT, Hist. Patriarch: Alexand., 50 sq.; Acta SS., IV, August, 579 sq.
APA citation. (1912). Theonas. In The Catholic Encyclopedia. New York: Robert Appleton Company. http://www.newadvent.org/cathen/14622a.htm
MLA citation. "Theonas." The Catholic Encyclopedia. Vol. 14. New York: Robert Appleton Company, 1912. <http://www.newadvent.org/cathen/14622a.htm>.
Transcription. This article was transcribed for New Advent by Thomas M. Barrett. Dedicated to the Poor Souls in Purgatory.
Ecclesiastical approbation. Nihil Obstat. July 1, 1912. Remy Lafort, S.T.D., Censor. Imprimatur. +John Cardinal Farley, Archbishop of New York.