Ramkhamhaeng

Ramkhamhaeng (Thai: รามคำแหง, pronounced [rāːm kʰām hɛ̌ːŋ] ), commonly known as Pho Khun Ramkhamhaeng the Great (Thai: พ่อขุนรามคำแหงมหาราช, pronounced [pʰɔ̂ː kʰǔn raːm kʰam hɛ̌ːŋ má hǎː râːt] ), was the third king of the Phra Ruang dynasty, ruling the Sukhothai Kingdom, a historical polity in what is now Thailand, from 1279 to 1298, during its most prosperous era.

He is credited with the creation of the Thai alphabet and with firmly establishing Theravada Buddhism as the state religion of the kingdom.

Notable works: Ram Khamhaeng inscription

Source: Wikipedia — https://en.wikipedia.org/wiki/Ramkhamhaeng