Surname アイン (Anh 
, Ayn 
, アイン 
) , around the world, is a widespread cognomen. The cognomen アイン is characteristic of Vietnam, where it is a common surname, Macao, where it is quite a common surname, and Vanuatu (explore the name in all countries). In absolute terms, this name is the most popular in Vietnam, Malaysia, and China. Also, アイン is the forename as well as the last name.