Cognomen Khalbay (Халбай 
, Халбаы , Khalbay) , across the world, is a very rare surname. The family name Khalbay is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia, where it is an extremely rare surname. More frequently, Khalbay is the forename as well as the last name.