| Choe Je-u | |
|---|---|
| Hangul | 최제우 |
| Hanja | 崔濟愚 |
| Revised Romanization | Choe Je-u |
| McCune–Reischauer | Ch'oi Che-u |
| Pen name | |
| Hangul | 수운 |
| Hanja | 水雲 |
| Revised Romanization | Su-un |
| McCune–Reischauer | Su-un |
Choe Je-u (1824∼1864) was the founder of Donghak, a Korean religious movement against foreign invasions and critical of Joseon Dynasty government policies of the time. He was from Gyeongju and his pen name was 'Suun'. He was martyred March 10, 1864 by order of the Daewongun.