Surname 규성 (규성 , Kyu-Sung ) , in all the world, is an extremely rare last name. Much more frequently, 규성 is the forename as well as the last name.
Kyu-Song, and ギュソン
, Kyu-Sung 
) , in all the world, is an extremely rare last name. Much more frequently, 규성 is the forename as well as the last name.