Thomas A. Carlson (ed.), "Mar Gregory" in last modified January 14, 2014, http://syriaca.org/place/2461 Mar Gregory Mār Gregory http://syriaca.org/place/2461 David Wilmshurst The Ecclesiastical Organisation of the Church of the East, 1318-1913 155 Barbellī Shemkān district ʿAmādīyā region