Chŏng Ku

Chŏng Ku was a Korean historian, philosopher, poet, and politician of the Joseon period. He learned from the Korean scholars Yi Hwang from 1563 to 1573 and Cho Sik from 1566 to 1573. A key figure of the Neo-Confucian literati, he established the Yeongnam School and set up the Paengmaewŏn, a private Confucian academy. His pen names were Hangang and Hoeyŏnyain, and courtesy name was Toga and Kabo.
He was the ideological successor of Yi Hwang and Cho Sik, moral support of Namin faction and Bokin faction. His masters were Hŏ Mok, Yun Hyu, and Yun Sŏndo. There was a conflict called the Yesong Controversy then polemic of the Namin faction. He came from the Jinju Jeong clan.

Family