The surname is considered to be originated in
Sinja valley of
Jumla region. The people living in Chaundila Gau (Chaundila village) are said to be later called as Chaulagain. In fourteenth century, during the Khas Empire and then in the Jumla kingdom, it was customary to provide wages to royal priests, astrologers, Pandits, army, officers, allies etc. by the kings. There are records of people with Chaulagain surname receiving the wages from the first king of Kalyal dynasty of
Jumal kingdom, Baliraja. The surname is then said to spread all around Nepal from Jumla region. Currently, there are many chaulagains residing in Nijgadh(Bara), Hetauda, etc who reportedly migrated from jyamire(kavrepalanchok). == Notable people ==