Duke Gwangpyeong (Korean: 광평공; Hanja: 廣平公; 1083–1170[a]), personal name Wang Won (왕원; 王源) was a Goryeo royal family member as the grandson of King Munjong.
[5] In 1086 (3rd years reign of King Seonjong), Wang Won was appointed as Geomgyosagongjuguk (검교사공주국; 檢校司空柱國) and later became Euncheonggwangnokdaebu (은청광록대부; 銀靑光祿大夫) and Sutaebu (수태부; 守太傅).
[6] During the reign of King Sukjong, Wang Won became Geomgyosaso Susagong (검교사도 수사공; 檢校司徒守司空) and Suchunggongsin Teukjingeomgyotaewi Susado (수충공신 특진검교태위 수사도; 輸忠功臣特進檢校太慰守司徒) in 1103.
[7] He also received Sukjong's 3rd daughter, Princess Ansu as his wife, honoured as Count Gwangpyeong (광평백; 廣平伯) and promoted into Gaebuuidongsamsa (개부의동삼사; 開府儀同三司) in 1111 (6th years reign of King Yejong).
[10] During his lifetime, Wang Won was said to well versed in both of Confucianism and Buddhism, excellent in medicine (의술; 醫術) and used his ability to widely take care and treat peoples.