Kumo Xi
The earliest written reference to the Khitan is from an official history of the Xianbei Northern Wei dynasty dating to the period of the Six Dynasties. Most scholars believe the Khitan tribe splintered from the Xianbei, and some scholars believe they may have been a mixed group who also included former members of the Xiongnu tribal confederation. The Khitan shaved their heads, leaving hair on their temples which grew down to the chest, in a similar fashion to the related Kumo Xi, Shiwei and Xianbei whom they are believed to be descended from.