Cognomen Adzhay (Аджай 
, Adzhay 
) , all around the world, is a very rare surname. The cognomen Adzhay is habitual in Russia, where it is a very rare surname, Ukraine, and Kazakhstan. Not in comparison with a country's population, this name is the most popular in Russia, China, and Ukraine. Likewise, Adzhay is the forename as well as the last name.