'Druk Gyalpo meaning "Dragon King" is the title for the King of Bhutan. Jigme Singye Wangchuck, (or in a pronunciation-based Romanization Jimi Singgê Wangchu) is the King of Bhutan. ...
In practice, regional penlops, or governors, often ran administered their districts in defiance of the power of the Desi Druks, until the rise of the unified monarchy in the early 20th century.
The monarchy was established in 1907, unifying the country under the control of the Wangchuck family, the traditional penlops of Trongsa district.
The king of Bhutan is formally known as the DrukGyalpo, the Dragon King.