Nagan O clan

Nagan O clan was one of the Korean clans. Their Bon-gwan was in Suncheon, South Jeolla Province. According to the research in 2000, the number of Nagan O clan was 9135. Their founder was O Sa ryong. O Sa ryong was a 32nd descendant of O Eung who was a second son of O Cheom. O Cheom came over from China to Silla during Jijeung of Silla’s reign in Silla dynasty. O Sa ryong was appointed as Prince of Nagan and began Nagan O clan because he defeated enemies when he served as government official during Goryeo period.