Last name Sung-Woo (성우 
, Sung-Woo 
) , across the world, is an extremely rare surname. The surname Sung-Woo is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more frequently, Sung-Woo is the forename as well as the last name. Parts of the name also exists independently as a last name Sung, and a last name Woo.