Druk Gyalpo is a Dzongkha word that means "King of the Thunder Dragon". It is the title of the head of state of Bhutan. The word Druk Gyalpo is derived from the words "Druk", which means "thunder dragon", and "Gyalpo", which means "king".
The Enchanting Reign: A Quiz on Jigme Khesar Namgyel Wangchuck, Bhutan's Mighty Monarch