The Royal Institute of Thailand speculates that Ram Khamhaeng's birth name was "Ram" (derived from Rama, the name of the hero of the Hindu epic Ramayana), for his name following his coronation was "Pho Khun Ramarat" (). Furthermore, the tradition at the time was to give the name of a grandfather to a grandson; according to the 11th Stone Inscription and Luang Prasoet Aksoranit's Ayutthaya Chronicles, Ram Khamhaeng had a grandson named "Phraya Ram", and two grandsons of Phraya Ram were named "Phraya Ban Mueang" and "Phraya Ram".