Phra Sunthonwohan (Thai: พระสุนทรโวหาร), known as Sunthorn Phu, is Thailand's best-known royal poet, He wrote during the Rattanakosin period.

Phu's career as a royal poet began in the reign of King Rama II, and when the king died, he resigned from the role and became a monk. Twenty years later, in the reign of King Rama III, he returned to court as a royal scribe, where he remained for the rest of his life.[2]

Phu was renowned for composing verse, and his epic poetry is popular in Thailand to the present day. His works include Nirat Phukhao Thong, a collection of poems recounting his journey to the Golden Mountain; Nirat Suphan, his journey to Suphanburi Province; and the Phra Aphai Mani saga.

