Last name Blej (Blej 
, Блей 
, Бляй ) , in the entire world, is a rare cognomen. The family name Blej is habitual in Finland, where it is a rare surname, Ukraine, and Russia, where it is a very rare surname. In absolute terms, the name is most common in Russia, Ukraine, and Myanmar. Much less frequently, Blej is the forename as well as the last name.