Thailand
Chao, Thai language lord: may also be transliterated čhao, câo, jao in Thai royal and noble titles and in the name of the Chao Phraya River; from Middle Chinese 主 (ćǘ) "master;" often rendered in English as "king" or "chief," the latter in allusion to either Chief of the Name or tribal chief, according to relative standing in mandala (Southeast Asian political model)
Read more about this topic: Chao