Last name Ай. (I. 
, Ай. 
) , around the world, is a common family name. The last name Ай. is habitual in Cyprus, where it is quite a common surname, Romania, and Indonesia, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Indonesia, Romania, and Spain. Also, Ай. is the forename as well as the last name.