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Family name Kulbaev (Кулбаев , Кульбаев , Kulbaev ) , globally, is quite a common cognomen. The surname Kulbaev is habitual in Azerbaijan, where it is quite a common surname, Kazakhstan, and Kyrgyzstan. Measured by absolute frequency, it is the most numerous in Kazakhstan, Azerbaijan, and Russia. Much less frequently, Kulbaev is the forename as well as the last name.