Last name Chernay (Chernay 
, Чернай 
) , across the world, is a rare cognomen. The family name Chernay is characteristic of Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. In absolute terms, this name is the most popular in Russia, Ukraine, and the United States. Much less frequently, Chernay is the forename as well as the last name.