Last name Чернаи (Csernai 
, Чернаи 
) , worldwide, is a rare surname. The surname Чернаи is characteristic of Hungary, where it is quite a rare surname, Serbia, and Germany, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Hungary, Serbia, and the United States. Much less frequently, Чернаи is the forename as well as the last name.