Surname Aiwan (Aiwan 
, อัยวรรณ 
, อัยวรรณ์ ) , in the world, is quite a rare family name. The cognomen Aiwan is habitual in Pakistan, where it is a rare surname, Thailand, and Malaysia, where it is a very rare surname. In absolute terms, the name is most common in Pakistan, Thailand, and Indonesia. Very seldom, Aiwan is the forename as well as the last name.