Gochang O clan
Gochang O clan was one of the Korean clans. Their Bon-gwan was in Gochang County, North Jeolla Province. According to the research in 2000, the number of Gochang O clan was 16716. Their founder was O Hak rin. He was a Hanlin Academy during Jeongjong, 10th monarch of Goryeo’s reign in Goryeo dynasty and a descendant of O Cheom who came over from China to Silla during Jijeung of Silla’s reign in Silla dynasty.