Cognomen Yun-Sik (Yun-Sik 
) , worldwide, is an extremely rare last name. The family name Yun-Sik is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Much more frequently, Yun-Sik is the forename as well as the last name. Parts of the name also exists independently as a first name Yun, and a last name Sik.