Helian Ding (; died 432), nickname
Zhifen (直獖), was the last emperor of the
Xiongnu state
Xia. He was a son of the founding emperor
Helian Bobo (Emperor Wulie) and a younger brother of his predecessor
Helian Chang. After Helian Chang was captured by rival
Northern Wei's army in 428, Helian Ding took the throne himself and for several years tried to resist Northern Wei attacks, but by 430 he had lost nearly his entire territory. In 431, he attempted to head west to try to attack
Northern Liang and seize its territory, but on the way, he was intercepted by
Tuyuhun's
khan Murong Mugui (慕容慕璝) and captured, ending Xia. In 432, Murong Mugui turned him over to
Emperor Taiwu of Northern Wei, who had him executed.