Sikkim was inhabited in pre-historic times by three tribes namely Naong, Chang and the Mon. The Lepcha who entered Sikkim sometimes later absorbed them completely. The origin of Lepchas is shrouded in mistery but it seems that they belonged to the clan of the Nagas of the Mikir, Garo and Khasia hills which lie to the south of the Bramaputra valley. Some believe they came from somewhere the borders of Tibet and Burma .According to their own tradition they came to Sikkim from the east in company with Jindaxs who went to Nepal and shared their tradition.