Belbase बेलबासे is a surname from the Middle Hills of western Nepal. The origin of the name appears to come from the village Belbas in Pyuthan District. It translates as "Place of Rest", literally staying under a Bel tree. People who moved from there to other parts of Nepal became known as Belbase. They have their family deity Dudhe Mosta and they belong to Madhu Kalya Gotra.
Others with this surname come from Arghakhanchi District of Lumbini Zone. Belbases have moved to other parts of Nepal as well as other countries.