Rajadhiraj II

Rajadhiraj II (Thai: ราชาธิราชที่ 2) is recorded in the Northern Chronicle as a mixed Mon–Chinese monarch of Mueang Chaliang (Si Satchanalai).^{[1]: 69–70} He was the youngest son of Dharmatriloka and ascended the throne following his father’s reign in the early 13th century, as his two elder brothers, Dhammaraja and Baramaraja, were unable to return to Chaliang after entering into matrimonial alliances with princesses of Ayodhya.^[2]: 25

Rajadhiraj II ราชาธิราชที่ 2
King of Si Satchanalai
King of Si Satchanalai
Reign	Early 13th century
Predecessor	Dharmatriloka
Successor	Sri Naw Nam Thum
Born	Si Satchanalai
Died	Early 13th-C. Si Satchanalai
Father	Dharmatriloka of Si Satchanalai

The source provides no further information regarding the administrative activities or achievements of Rajadhiraj II. His reign, however, appears to have been brief, as the emergence of a new Tai dynasty led by Sri Naw Nam Thom [pt]—who had established dynastic ties with Angkor through the marriage of his son, Pha Mueang, to Sukhara Mahadevi [km], a princess under Jayavarman VII^[3]—brought about a significant shift of political power in Mueang Chaliang. In 1219 CE, this new dynasty successfully captured Sukhothai from E Daeng Phloeng, a Mon monarch potentially identifiable as the successor of Pra Poa Noome Thele Seri of the Xiān lineage from Xiū Luó Fēn.^[4][5]