Uthong

King U-thong or King Ramathibodi I was the founder and first monarch of the Ayutthaya Kingdom, reigning from 1351 to 1369. He is traditionally regarded as a pivotal figure in Thai history for unifying the rival power centers of Lopburi (Lavo) and Suphan Buri (Suphannaphum), establishing a centralized state that would dominate mainland Southeast Asia for over four centuries.