Several Koreans have borne the name Yi Ik. They are most readily distinguished by their pen names:
- Ganong Yi Ik, 1579-1624, official exiled during the reign of Gwanghaegun of Joseon.
- Nongjae Yi Ik, 1629-1690, high official under Hyeonjong and Sukjong of Joseon
- Seongho Yi Ik, 1681-1763, early Silhak philosopher and social critic.