Phra Khattiyawongsah, the first ruler of Roi Et, appointed in 1775 AD during the reign of King Taksin (fig.). He is nicknamed Thon and was the son of the leader of Meuang Thong. He founded Roi Et by bringing in evacuees from Meuang Thong and is considered a great ruler, as he was able turn Roi Et into one of the most prosperous cities in the Northeastern region. A monument in his honour is erected in Roi Et's city centre (fig.).