He was the second son of King Si Inthrathit of Sukhothai and his wife, Sueang.[7] He succeeded his father to the throne of Sukhothai in an unknown year and reigned until his death, which occurred around 1822 BE (1279/80 CE).[1]
My father was named Si Inthrathit. My mother was named Lady Sueang. My elder brother was named Ban Mueang. There were five of us born from the same womb: three boys and two girls. My eldest brother died when he was still a child... In my father's lifetime, I served my father and I served my mother. When I caught any game or fish, I brought them to my father. When I picked any acid or sweet fruits that were delicious and good to eat, I brought them to my father. When I went hunting elephants and caught some, either by lasso or by driving them into a corral, I brought them to my father. When I raided a town or village and captured elephants, men and women, silver or gold, I turned them over to my father. When my father died, my elder brother was still alive. I served him steadfastly as I had served my father. When my elder brother died, I got the whole kingdom for myself.
As stated by both inscriptions, Ban Mueang was, upon his death, succeeded by his younger brother, Ram Khamhaeng.[1]
A historical document, Jinakalamali, states that Ban Mueang had a son, Ngua Nam Thum, who later became a king of Sukhothai.[3]
A great-great-grandchild of Ban Mueang was named after Ban Mueang according to the ancient custom of naming a baby after its ancestor.[10] The great-great-grandchild ascended the throne of Sukhothai as Mahathammaracha IV.[11]
Na Nakhon, Prasoet (2006). Prawattisat Bettalet ประวัติศาสตร์เบ็ดเตล็ด [Historical Miscellanea] (in Thai). Bangkok: Matichon. ISBN9743236007.
Princess Maha Chakri Sirindhorn Foundation (2011). Namanukrom Phramahakasat Thai นามานุกรมพระมหากษัตริย์ไทย [Directory of Thai Kings] (in Thai). Bangkok: Princess Maha Chakri Sirindhorn Foundation. ISBN9786167308258.
Wongthes, Sujit (1983). Sukhothai Mai Chai Ratchathani Haeng Raek Khong Thai สุโขทัยไม่ใช่ราชธานีแห่งแรกของไทย [Sukhothai is not the first Thai kingdom] (in Thai). Bangkok: Matichon. ISBN9748350363.