Father-in-law of Mun Ik-jeom, credited with helping spread cotton
| Era | 고려 |
| Clan | 진주 정씨 |
Jeong Cheon-ik is said to have been an official under King Gongmin and the father-in-law of Mun Ik-jeom. He is credited with cultivating and spreading the cotton seeds Mun brought back, and with spreading the cotton gin and spinning wheel, though details vary by source. His dates are unknown.