Agathangelus
From BiblePortal Wikipedia
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [1]
an Armenian historian and secretary to Tiridates, first Christian king of that country, lived about (probably) 320. He wrote the Life of St. Gregory Illuminator, and History. of the Introduction of Christianity into. Arinenia (Constantinople, 1709, 4to). The National Library of Paris has a copy of this book and a manuscript much more complete."
