Surname Sung-Hoon (성훈 
, Sung-Hoon 
) , across the world, is an extremely rare cognomen. The last name Sung-Hoon is habitual in Southern Europe, particularly Spain, where it is an extremely rare surname. Predominantly, Sung-Hoon 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 Hoon.