Uriankhai (also written as "Uriyangkhai", "Urianhai", or "Uryangkhai") is a Mongolian term applied to several neighboring "forest" ethnic groups such as the
Altai Uriankhai,
Tuvans and
Yakuts. The Uriankhai have been mentioned in medieval Chinese sources since the 10th century and the name appears several times in
The Secret History of the Mongols. It is recorded in Chinese as
Wulianghai or
Wuliangha .