Family name Koulei (Кулей 
, Koulei 
) , in all the world, is a rare surname. The surname Koulei is habitual in Ivory Coast, where it is a rare surname, Belarus, and Greece, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Ivory Coast, Russia, and Belarus. Very seldom, Koulei is the forename as well as the last name.