Surname Yun-Jeong (윤정 
, Yun-Jeong 
) , throughout the world, is an extremely rare cognomen. The surname Yun-Jeong is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Predominantly, Yun-Jeong is the forename as well as the last name. Parts of the name also exists independently as a first name Yun, and a first name Jeong.