Kumo Xi
The Dōnghú later divided into the Wuhuan in the Yan Mountains and Xianbei in the Greater Khingan Range: the former of whom are ancestors of the Kumo Xi, while the latter of whom are ancestors of the Khitan and the Mongols; another people of Donghu descent were the Rouran. A genetic study published in the "American Journal of Physical Anthropology" detected the paternal haplogroup C2b1a1b among the Xianbei and Rouran. This lineage has also been found among the Donghu. Haplogroup C2b1a1b has a high frequency among Mongols.