Cognomen ดาวน์ (Dao 
, Down , Downs 
) , around the world, is a widespread surname. The family name ดาวน์ is characteristic of Taiwan, where it is quite a common surname, Macao, and Vietnam (explore the name in all countries). In absolute terms, the name is most common in the United States, Vietnam, and China. Much less frequently, ดาวน์ is the forename as well as the last name.