Bahun, also known as Hill Brahmins, are a Brahmin varna among the Khas of Nepal. While their origins are disputed, the traditional view is that they arrived from India during the fourteenth century. Janajati activists usually view the Khas Aryas as migrants, while most Khas Arya academics-cum-activists claim that the group has always lived in Nepal. According to the 2011 Nepal census, Bahun is the second most populous group after Chhetri.