Surname Kydyrbai (Кыдырбай 
, Kydyrbai ) , throughout the world, is a rare cognomen. The family name Kydyrbai is habitual in Kyrgyzstan, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia, where it is an extremely rare surname. More prevalently, Kydyrbai is the forename as well as the last name.