Cho Inbyŏk

Cho Inbyŏk (1330–1393) was a military commander of the late Goryeo dynasty from the Hanyang Cho clan, whose forebears had governed Ssangseong for the Yuan. In 1356 he and his father Cho Ton helped Goryeo retake Ssangseong. He fought Red Turban invaders in 1361 and helped crush Kim Yong's rebellion in 1363.

In 1372 he ambushed Japanese pirates near Hamju, beheading at least seventy men. Married to a sister of Yi Sŏng-gye, he became Internal Prince Yongwŏn after the Joseon founding in 1392.