Last name Ай (Ai 
, Aj 
, Ay ) , throughout the world, is a widespread cognomen. The cognomen Ай is habitual in Turkey, where it is a common surname, Malaysia, where it is quite a common surname, and Brunei (explore the name in all countries). Not in comparison with a country's population, the name is most common in China, Turkey, and Indonesia. Likewise, Ай is the forename as well as the last name.