Family name Sung-Kyun (성균 
, Sung-Kyun 
) , all around the world, is a very rare cognomen. The surname Sung-Kyun is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. Much more prevalently, Sung-Kyun 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 Kyun.