Who is Sejo?
Sejo (Korean: 세조; Hanja: 世祖; 7 November 1417 – 23 September 1468), personal name Yi Yu (이유; 李瑈), sometimes known as Grand Prince Suyang (수양대군; 首陽大君), was the seventh monarch of the Joseon dynasty of Korea. He was the second son of Sejong the Great and the uncle of King Danjong, against whom he led a coup d'état in 1453.
