Sundararavarman

Śrī Sundararavarman (, ) is documented in the Śrī Canāśa Inscription (K.949) as the sovereign of Canasapura, cautions that the evidential base for Cānāśa is unusually narrow. The name is attested in this inscription and in the Bo Ika inscription alone, and in no literary source, and he describes the polity as a mystery that speculation cannot resolve. He adds that old Khorat lay on the routes later taken by Ayutthayan armies marching to the plateau, so the stone found at Ayutthaya may have been carried south at some later date. whose political center was situated at Si Thep, with serving as a prominent regional administrative center. His reign appears to have been characterized by the ascendancy of Shaivism, as indicated by the royal epithet -varman, a titular element conventionally associated with Hindu monarchs of the period. This religious orientation contrasts with that of his predecessor, who is believed to have adhered to Buddhist traditions. The material culture of Si Thep during Sundararavarman’s reign further corroborates this shift, as evidenced by architectural remains that display a pronounced stylistic convergence with contemporaneous Angkorian Hindu temple styles.

Epigraphic evidence also records that Sundararavarman fathered two sons. The elder, Narapatisimhavarman, succeeded him as ruler, while the younger son is credited with commissioning the Śrī Canāśa Inscription, thereby perpetuating both dynastic memory and religious-political legitimacy. However, the eastern region centered on Talung (), situated in the present-day Prakhon Chai district, appears to have exercised a substantial degree of political autonomy during the reign of Sundararavarman. In this context, a new ruler—bearing the regnal name Mahidharavarman I—emerged around 920 and established a new political center in the Phanom Rung area, known as Kasitindrakama. Its political orientation was defined by strong and enduring affiliations with Angkor to the south.

During his rule, the earliest settlement in the swamp basin corresponding to present-day Ayutthaya was reportedly founded by a noble from Bang Pan to the north.