Korean clan from North Gyeongsang Province
Pyeonghae O clan (Korean: ; Hanja: ) was one of the Korean clans. Their Bon-gwan was in Uljin County, North Gyeongsang Province. According to the research in 1985, the number of Pyeonghae O clan was 1264. Their founder was O Geuk jung. O Geuk jung was a descendant of O Hyeon bo (Hanja: ) who served as a "Tong Zhongshu Menxia Pingzhangshi" (Hanja: ). O Hyeon bo (Hanja: ) was a 24th descendant of O Cheom (Hanja: ) who came over from China to Silla during Jijeung of Silla’s reign in Silla dynasty.