Dayan Khan
Manduulun's young khatun Mandukhai proclaimed a seven-year-old boy named Batumongke of Genghisid descent as khan. Mandukhai made persistent efforts to bring the various Mongol tribes under control. The new khan took the title "Dayan" meaning the "Great Yuan". Mandukhai and Dayan Khan defeated the Oirats and the taishis who ruled the Yellow River Mongols. However, one of them killed Dayan Khan's son and revolted when Dayan Khan appointed his son, Ulusbold, as jinong (crown prince) over them. Dayan Khan finally defeated the southwestern Mongols in 1510 with the assistance of his allies, Unebolad wang and the Four Oirats. Making another of his sons jinong, he abolished old-Yuan court titles of taishi, chingsang, pingchan and chiyuan.