Jibügen
Jibügen (born c. 1190) was the eldest son of Temüge Otchigin, Genghis Khan's youngest brother, who held the great eastern appanage around the Khingan Mountains. Though expected to succeed his father as head of the Otchigin family, he died before him, around 1225.
His early death meant that when Temüge at last died in 1246, Jibügen's young son Taghachar inherited the appanage; Taghachar's half-brother tried to seize power, and the succession was only secured by the regent Töregene Khatun.