Sejong the Great
the fourth king of Joseon.
Born with family name Yi , given name Do , family origin Jeonju , sobriquet Wonjeong. Posthumous name is Sejong. Posthumous title, abbreviated, is JangHun Great King , and official title is Sejong Jangheon Yeongmun Yemu Inseong Myeonghyo Daewang. He was the third son between King Taejong and Queen-Consort Min. He was designated as heir-apparent, Grand Prince, after his older brother Jae was stripped of his title. He ascended to the throne in 1418. During the first four years of his reign, Taejong governed as regent, and this was when his father-in-law, Shim Ohn, and his close associates were executed