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 Mugulu, 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".