Ong Khan
Ong Khan, alternately known as Unc Khan, Tooril Khan, and King John was the Khereid ruler in the late 12th/early 13th centuries. Reportedly a Nestorian Christian-- although according to Bar Hebraeus' Chronicon Syriacum, a lapsed one-- Ong Khan was killed by his blood brother and subordinate, the soon-to-be Genghis Khan, who was acting on rumors that a jealous Ong was planning to kill him.
