Family name 태양 (Taeyang 
, 태양 , Tae-Yang) , in all the world, is a rare surname. The family name 태양 is habitual in South Korea, where it is a rare surname, Malaysia, and Singapore. Measured by absolute frequency, it is the most numerous in South Korea, Malaysia, and Indonesia. More frequently, 태양 is the forename as well as the last name.