Sun-Mu (孫穆), a Chinese ambassador of the Song dynasty (宋朝; 960AD–1279AD) to Goryeo (918AD-1392AD), stated in his book (《雞林類事》) that 漢 meant 'white' in the language of Goryeo ("高麗方言謂白曰漢"). So I assumed Korea's "Han River" (漢江) actually meant 'White River', which originated in the "Great White Mountain" (太白山) now commonly known as Mount Daedeok. Wikipedia, however, says 'han' (漢) means 'great' in the name "Han River" (漢江). Which one is correct? Are both etymological explanations plausible?