Song Ikpil
Song Ikpil (Korean: 송익필; Hanja: 宋翼弼; February 10, 1534 – August 8, 1599) was a politician and Neo-Confucian scholar and educator. His art names were Gubong (구봉; 龜峰) and Hyeonseung (현승; 玄繩), and his courtesy name was Unjang (운장; 雲長). Song was best friends of Yi I, Seong Hon and Jeong Cheol and taught Kim Jang-saeng.