Phraek Si Racha

Phraek Si Racha was a town on the Noi River, whose Mon name means the town at a confluence. Settled since Dvaravati times, it was recorded in Chinese annals as Duō Miè, which sent tribute in 661; many scholars identify it with Chên Li Fu, whose embassies reached Song China in 1200, 1202 and 1205.

Thai chronicles say its last independent ruler Anuraja lost the town to Tambralinga around 1167, while princes of his line fled north. One, Suryaraja, was the grandfather of Sukhothai's founder Si Inthrathit. The Ram Khamhaeng Inscription later lists Phraek Si Racha among Sukhothai's vassals, and by the fourteenth century it had passed into the orbit of Lavo and then Ayutthaya.

Ayutthaya's founder Ramathibodi I kept his brother as ruler, titled Phra Si Rachathirat. Tradition traces the king's maternal ancestry to the Phraek Si Racha ruling house.