Yi Jehyeon
Yi Jehyeon was a politician and early Korean Neo-Confucianism scholar and philosopher, writer, and poet. His first name was Jigong. A pen name was Ikjae ·Yeogong ·Shiljae, courtesy name was Jungsa. He was a follower and successor of Baek Yijeong, and was the father of Hyebi Yi, who was a concubine of Gongmin of Goryeo.