Chaldean Catholic Eparchy of Seert
He was succeeded by the Rabban Hormizd monk Mikha'il Kattula of Telkepe, one of the many opponents of Yohannan VIII Hormizd, who was consecrated in 1826 by Joseph V. He died in 1855 and was buried in the monastery of Mar Yaqob.
Antipope Gregory VIII
Gregory VIII (died 1137), born Mauritius Burdinus ("Maurice Bourdin"), was antipope from 10 March 1118 until 22 April 1121.