The Dongxiang are closely related to the Mongolians. Scholars speculate that their identity as an independent ethnic group arose through contact with Central Asians, due to whom the Dongxiang converted to Sunni Islam in the 13th century.
One possible origin is that they are descendants of Mongolian troops posted in the Hezhou area by Genghis Khan (1162-1227 AD) during his journey westward, while another possibility is that they could be a mixture of many peoples including Mongolian, Han, and Tibetan groups.