Noyen Eljitai Noyon Borjigin dynasty

In 1389, the Ming Dynasty formed three guards for Mongol chiefs on the eastern slopes of the Khinggan. The Uriankhai clan formed the Doyin Guard (Doyan in Chinese language) on the Chaor River.

The core branch of the Doyan Uriankhai were people of the uls (kingdom) of King Eljitai, who was a son of Genghis Khan's younger brother Khajiun. According to Rashid al-Din, there were three larger tribes of the Naimans, the Tatars, the Uriankhai, and some unknown smaller ones in Eljitai Uls. An Uriankhai chieftain Chaurkhan (Чаурхан) who was cousin of General Zelme (Зэлмэ) and Subedei (Сүбэдэй), was appointed to be the chief general of Eljitai Uls by Genghis Khan. It was recorded that his troop consisted of 2000 Oirads soldiers. In 1280s, Eljitai's successors with other Mongol nobles led a rebellion against Khubilai Khaan, but it was finally repressed soon and those nobles were punished cruelly by Khubilai Khaan. The family of Eljitai lost their rule on their people after the rebellion, while the Uriankhai nobles controlled the ruling power on Uljitai Uls gradually. After Khubilai Khaan defeated Khaidu Khaan, the grandson of Ögedei Khaan, the Kyrgyz, the Ursuud (Урсууд) and the Khabkhanas (Хабханас) of Khaidu's Khanate, were compelled to immigrate to Uljitai Uls and joined the Doyan Uriankhai. A group of the Uriankhai was also appointed to guide the altar of Queen Hoelun, the mother of Chinggis Khaan. They seemed different from the Uriankhai of Uljitai Uls at first, but for unknown reasons they immigrated from the Uls of Queen Hoelun and her youngest son Temüge to join the Doyan Uriankhai and guarded the altar of Queen Hoelun in Ekh Doyan Öndör Mountain area, located in the today's Jalaid banner, Xing’an league, Inner Mongolia. We also noticed that almost all of Uriankhai families among the Kharchins claimed they were descendants of General Zelme but not Chaurkhan, that maybe suggested there is a larger population of the Uriankhai from Temüge Uls to join the Original Uriankhai tribe in Eljitai Uls.

http://en.wikipedia.org/wiki/Kharchin_Mongols