Cognomen 윤아 (Yoona 
, 윤아 , Yoon-Ah 
) , all over the world, is quite a rare family name. The cognomen 윤아 is habitual in Myanmar, where it is a rare surname, Malaysia, and South Korea. Not in comparison with a country's population, it is the most numerous in Indonesia, Myanmar, and South Korea. More frequently, 윤아 is the forename as well as the last name.