Surname Yyan (Yyan 
, Иыан 
) , around the world, is a rare last name. The last name Yyan is habitual in Myanmar, where it is a rare surname, Australia, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Myanmar, China, and Australia. More frequently, Yyan is the forename as well as the last name.