Cath. ca. 581/2–95. Originating from Beth ʿArbaye , he studied at the School of Nisibis, and was for two years its head, before becoming bp. of Arzon. In ca. 581/2 he was elected cath. , and in 585 held an important synod, whose Acts, including 31 canons, are inluded in the Synodicon Orientale. The Synodicon also preserves his Letter to Yaʿqub, bp. of Darai (with 20 further canons), and a Creed composed by him. A further work by him, on the Trisagion (‘Thrice holy’), is transmitted separately.