Cognomen Seryy (Серый 
, Seryy 
, Серыи ) , in the world, is quite a rare surname. The cognomen Seryy is habitual in Belarus, where it is quite a rare surname, Russia, and Kazakhstan, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Eastern Europe, particularly Russia, Belarus, and Ukraine. Much less frequently, Seryy is the forename as well as the last name.