Adītaraj

Adītaraj (, ) is mentioned in the Pali (The Chronicle of the Emerald Buddha) as a monarch of the early Siamese polity. He is recorded as ruling over Ayojjhapura, According to these sources, Ayojjhapura functioned as the metropolitan center located north of Lavo's Lavapura. Based on this geographical description, Thai historians have proposed an identification of Ayojjhapura with Si Thep, which is recorded in Chinese sources as Qiān Zhī Fú.

The Ratanabimbavaṃsa further records that Adītarāja launched an invasion of Inthapatnakhon , following the demise of its great ruler, Senakarāja. As a result of this campaign, Adītarāja is said to have successfully obtained the Emerald Buddha. On this basis, his reign may tentatively be placed around the early 9th century. He was thereafter possibly succeeded by Bhagadatta in 859.