Eunomius, bishop of Cyzicus and member of the Arian party, fell into such open blasphemy in his heresy, as to proclaim publicly what the others concealed. He is said to be still living in Cappadocia, and to write much against the church. Replies to him have been made by Apollinarius, Didymus, Basil of Cæsarea, Gregory Nazianzen, and Gregory of Nyssa.
Source: De Viris Illustribus (Illustrious Men) (New Advent)