The name Mongolia means the "Land of the Mongols" in Latin. The origin of the Mongolian word ''"Mongol"'' () is of uncertain etymology, given variously such as the name of a mountain or river; a corruption of the Mongolian ''Mongkhe-tengri-gal'' ("Eternal Sky Fire"); or a derivation from Mugulü, the 4th-century founder of the Rouran Khaganate. First attested as the ''Mungu'' (Chinese: , Modern Chinese ''Měngwù'', Middle Chinese ''Muwngu'') branch of the Shiwei in an 8th-century Tang dynasty list of northern tribes, presumably related to the Liao-era ''Mungku'' (Chinese: , Modern Chinese ''Měnggǔ'', Middle Chinese ''MuwngkuX'') tribe now known as the ''Khamag Mongol''.