Youhanna N. Youssef is a researcher at Centre for Early Christian Studies- Australian Catholic University. He holds a PhD from Montpellier Univeristy (France) in Coptology. He has written extensively on computational linguistics in the field of Coptic and in Copto-Arabic studies and is the author of The Life and Works of Severus of Antioch in the Coptic and Copto-Arabic Tradition.