Last name Grai (Grai 
, เกรย์ 
, Грай 
) , all around the world, is a rare cognomen. The cognomen Grai is habitual in Ukraine, where it is a rare surname, Israel, and Norway, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Ukraine, India, and Thailand. Much less frequently, Grai is the forename as well as the last name.