Family name アイナ (Aina 
, アイナ 
) , all over the world, is a widespread surname. The family name アイナ is habitual in Sub-Saharan Africa, particularly Nigeria, where it is quite a common surname, Madagascar, and Namibia (explore the name in all countries). Not in comparison with a country's population, the name is most common in Nigeria, Indonesia, and Japan. Likewise, アイナ is the forename as well as the last name.