Late Goryeo general who helped recover Ssangseong and fought Japanese pirates; Prince Yongwon
| Life | 1330 ~ 1393 |
| Era | 고려 말~조선 초 |
| Clan | 한양 조씨 |
Jo In-byeok (趙仁璧, 1330-1393) was a late Goryeo military official of the Hanyang Jo clan, a great-grandson of the Ssangseong commander Jo Hwi and eldest son of Jo Don. His posthumous title was Yangnyeol (襄烈).
In 1356 he helped the Northeastern Military Commissioner Yu In-u by winning over the people of Ssangseong; according to the History of Goryeo they surrendered one after another, saying, 'Officer Jo has come, so we shall live.' He became a guard general for this, and in 1363 a second-rank merit subject for suppressing Kim Yong's revolt. In 1372 he put down a rising at Gaju, and when Japanese pirates raided Hamju and Bukcheong that year he ambushed and routed them, earning promotion to Bongik Daebu.
Under King U he captured the monk Seokgi, who claimed to be a son of King Chunghye, and as commander of the Northeast, Gangneung and other regions he repeatedly drove off Japanese pirates; in 1377 he attacked raiders at Sinju, Ongjin and Munhwa with Na Se and Sim Deok-bu but had to fall back before their strength, and in 1382 he took some thirty pirate heads in Gangneung. In 1378 he trained the navy with firearms; in 1383 he guarded the frontier as Inspector-General of the Northeast; and in 1385 he served as commander of four provinces and of Gyoju. He joined the Wihwa Island withdrawal in 1388, became Samsa Jwasa, was made Panuideokbusa in 1389 and was listed as a second-rank merit subject of the withdrawal in 1390.
He married Princess Jeonghwa, daughter of Yi Ja-chun, becoming King Taejo's brother-in-law, and after the founding of Joseon was made Prince Yongwon. His eldest son Jo On, born of his first wife, founded the Yangjeol-gong line, and Princess Jeonghwa's son Jo Yeon founded the Yanggyeong-gong line; his other sons Jo Hu, Jo Sa and Jo Bu also rose to high office. His descendants became the largest line of the Hanyang Jo clan.