Family name ディアン (Deanne 
, Diyan 
, ディアン 
) , in all the world, is quite a common last name. The last name ディアン is habitual in Indonesia, where it is a rare surname, Pakistan, and Morocco. Not in comparison with a country's population, it most frequently occurs in Indonesia, Pakistan, and India. More frequently, ディアン is the forename as well as the last name.