Bahun (Nepali: बाहुन) or Khas Brahmin (Nepali: खस ब्राह्मण) is a caste (Varna) among Khas people of Nepal. Their origins are from the Indo-Aryan Khasa tribe of Nepal and South Asia. According to the 2011 Nepal census, Bahun is the second most populous group after Chhetri, another Varna within the hill Hindus in Nepal. According to 1854 Muluki Ain (Nepalese Legal Code), Bahuns were regarded as caste among sacred thread bearers (Tagadhari) and twice-born Hindus.