Örüg Temür Khan

Örüg Temür Khan, possibly also known by his nickname as Guiranchi, was a khagan of the Northern Yuan dynasty, reigning from 1402 to 1408. Örüg Temür, in historical materials compiled by the Timurid dynasty, has been a descendant of Ögedei. He might also be descended from either Ariq Böke or Genghis Khan's younger brothers—either Hasar or Temüge.

Elbeg Khan appointed Bahamu (Batula, Mahamu, Muhamud) ruler of the Four Oirats after he had mistakenly executed his father Khuuhai. The Khagan's decision disappointed the Oirat Torguud clan leader Ugechi Khashikha (; , "Khashikha" means prince or duke in the Tungusic languages). Ugetchi Khashikha and Bahamu organized the plot to kill Elbeg and succeeded; the former seized the family and property of the late Khagan. There's a dispute over whether Örüg Temür was the same person as Ugechi Khashikha himself, because the Ming Dynasty recorded fierce battles between Guilichi of Eastern Mongols and Oirat's leaders. Thus, it is still unclear whether he was an Oirat or a Genghisid. The History of Ming recorded that Guilichi became the new khagan in 1402 and abolished the dynastic title of "Great Yuan" (大元) promulgated in 1271 by Kublai; however, the Han-style title had already been abolished in 1388.

Reign Guilichi appointed Arughtai of the Asud chingsang of the Eastern Mongols. According to Ming annals, he might have nominated a “Tatar” (East Mongols) khan. The Yongle Emperor made overtures to Guilichi and his principal retainer Arughtai to establish a relationship within Ming China's tributary system, but Guilichi and Arughtai rejected it. They also poisoned Engke Temur, Prince of Hami, who had allied with the Ming. However, Guilichi was defeated by Öljei Temür Khan, the Kublaid descent Borjigin monarch, in 1403. In 1408, his former chingsang and noyan Arughtai killed him after a conflict erupted between them.