Family name Kurbanbai (Курбанбай 
, Курбанбаи , Kurbanbai ) , in all the world, is a rare last name. The last name Kurbanbai is characteristic of Kyrgyzstan, where it is quite a rare surname, Kazakhstan, where it is a very rare surname, and Russia, where it is an extremely rare surname. More prevalently, Kurbanbai is the forename as well as the last name.