Who or what adopted the chinese name yuan for his dynasty

Yuen is a Cantonese transliteration, which can refer to: Yuan (surname), the Pinyin transliteration of the Han Chinese surnames 袁, 元, 源, 原 and 苑 Ruan (surname), the Pinyin transliteration of the Han Chinese surname 阮 Chinese yuan, the basic unit of currency in China.

In official Chinese histories, the Yuan dynasty bore the Mandate of Heaven, following the Song dynasty and preceding the Ming dynasty. The dynasty was established by Kublai Khan, yet he placed his grandfather Genghis Khan on the imperial records as the official founder of the dynasty as Taizu.