Seo Gyeong-deokartist Heo Gyun - Korean novelist, philosopher, and politician Yi Ji-ham (이지함) - Korean astrologer, diviner, and politician Heo Nanseolheon - Korean poet
Jeonggamnokand the Joseon period seers Nam Sago (1509–1571) §10,§11 and Yi Ji-ham (이지함, 李之菡, 1517–1578) §23,§24. Taken together, they can be described as some Jeonggamnok