Origin of caste system in Nepal: When Muslim invaded western north india such as a "Rajesthan" then Indian migrated as Asylums to Nepal from these area of India. So then, Rajesthani brahmin brought Caste system, Saathi pratha, Child marriage, Hindu Religion, Dorry system, Slavery etc and practiced in Nepalese society. (1) Brahmin Caste: Neupane, Koirala, Paudel, Nirwala, Chiluwal, Adhikari, Dhakal etc. (2) Chetri Caste: Shaha, Rana, Malla, Thapa, Basnet, Khadka, Karki etc. (3) Basya Caste: Newar, Raj Bansis etc. (4) Sudra Caste: Damai, Kaami, Sunawar, Sarki etc.