Sejo of Goryeo
| Korean name | |
| Hangul | 세조 |
|---|---|
| Hanja | 世祖 |
| Revised Romanization | Sejo |
| McCune–Reischauer | Sejo |
| Birth name | |
| Hangul | 왕륭 |
| Hanja | 王隆 |
| Revised Romanization | Wang Yung |
| McCune–Reischauer | Wang Yung |
| Posthumous name | |
| Hangul | 위무대왕 |
| Hanja | 威武大王 |
| Revised Romanization | Wimu-Daewang |
| McCune–Reischauer | Wimu Taewang |
Sejo of Goryeo, born Wang Ryung (Hangul: 왕륭; Hanja: 王隆, died May 897) was the father of Wang Geon. After his son founded Goryeo as Taejo of Goryeo, he was titled Yonggeon (hanja: ), Munmyeong (hanja: ). He was born in Kaesong, as the fourth son of Jakjaegeon (Hangul: 작제건; Hanja: 作帝建) and Yongnyeo (용녀).
Gang Chung was a son of Gang Ho-gyeong who was the 67th descendant of Gang Hou. Gang Hou was the second child of Gang Shu who was from Zingzhao country, Shangxi province in China. He had three children named as I-Jegeon, Bo-Seung and Gang Bo Yuk. Gang Bo Yuk married with his niece Gang Deju and their daughter Gang Sin-ui was born. Gang Sin-ui married with Chinese man and King Uijo of Goryeo was born. The father of King Uijo was royal family from Tang dynasty, China. According to Pyeonnyeon-Tong-Long () and Goryeosa jeolyo (), he was Emperor Suzong of Tang. In Pyeonnyeongangmog (Hangul: 변년강목; Hanja: 編年綱目), Emperor Xuānzong of Tang was father of King Uijo. When his father visited Silla, King Uijo of Goryeo was born between his Chinese father and Gang Sin-ui who was a daughter of Gang Bo Yuk. On the way of finding his father to China, King Uijo met Queen Wonchang and get married with her. According to Record of Seongwon (Hangul: 성원녹; Hanja: 聖源録), Queen Wonchang was a daughter of Tou En Dian Jiao Gan from Ping state (), China. Queen Wonchang gave birth of a boy. His name was Wang Ryung and his son was the founder of Goryeo, Taejo of Goryeo.
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