Goesan Pi clan ( Korean: 괴산 피씨; Hanja: 槐山 皮氏) was one of the Korean clans. Their Bon-gwan was in Goesan County, North Chungcheong Province. According to the research in 2000, the number of Goesan Pi clan was 2204. Their founder was Pi Gyeong jeong [ ja]. He served as Jinzi Guanglu Daifu ( Hanja: 金紫光祿大夫) in Yuan dynasty. He made Toghon Temür furious because he lost war. As a result, he exiled himself with his family. Goesan Pi clan was begun after Gongmin of Goryeo appointed Pi Gyeong jeong [ ja] as Prince of Goesan ( Hanja: 槐山君). ^[1]

• Korean clan names of foreign origin

• Doosan Encyclopedia 외래귀화성씨 外來歸化姓氏. Doosan Encyclopedia.