Yi Hwang
The ideologies of the Easterners were very diverse, including pupils of Jo Sik, Yi Hwang, and Seo Gyeongdeok. The people who formed the Easterners were largely of the Yeongnam School of philosophy, which included Jo Sik and Yi Hwang. By contrast, the majority of the Westerners were of the Giho School of Yi Yi and Seong Hon. Later, as the Nammyeong School collapsed, the phrase 'Yeongnam School' became synonymous with the Toegye School.