Family name Sagynbay (Сагынбай 
, Сагынбаи , Сагынбаы ) , across the world, is a rare cognomen. The cognomen Sagynbay is habitual in Kyrgyzstan, where it is quite a common surname, Kazakhstan, where it is a very rare surname, and Russia. More prevalently, Sagynbay is the forename as well as the last name.