Family name Блэй (Blay 
, Блэй) , throughout the world, is a common surname. The cognomen Блэй is characteristic of Ghana, where it is quite a common surname, Guadeloupe, and Israel, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Ghana, France, and Philippines. Very seldom, Блэй is the forename as well as the last name.