Surname Агатай (Агатай 
, Agatay 
, Agatai 
) , in all the world, is a very rare cognomen. The surname Агатай is habitual in Turkey, where it is a very rare surname, Kazakhstan, and Germany. Not in comparison with a country's population, it is commonest in Turkey, India, and Germany. More frequently, Агатай is the forename as well as the last name.