Yi Bang-gwa

Yi Bang-gwa (1357–1419), posthumously King Jeongjong, was the second king of Joseon and the second son of its founder, Yi Seong-gye. A career officer from the last Goryeo campaigns, he took the throne in 1398 after Yi Bang-won's coup in the First Strife of Princes killed the crown prince and Jeong Do-jeon and drove Taejo to abdicate.

Bang-won had promoted him, the eldest surviving son, as successor, and he moved the court back to Gaegyeong the same year. After Bang-won won the Second Strife of Princes in 1400, Jeongjong named him crown prince and abdicated months later. He died in 1419.