Gangyang-gong

Duke Kangyang or Prince Kangyang (; died 1308), born Wang Cha, was a Goryeo royal prince as the first and oldest son of King Chungnyeol and Princess Jeongsin, also great-grandfather of its last monarch, King Gongyang.

Biography Palace life As the oldest son and since his mother was King Chungnyeol's first wife, Wang Cha was the one who should become the crown prince. Yet, due to Yuan dynasty influence on Goryeo after the king's marriage with Kublai Khan's daughter–Qutugh Kelmysh, Wang Cha must give up the crown prince position to his half younger brother.

In 1279 (5th years reign of his father), Wang Cha had to go to the temple Dongsimsa in Aju, Chungcheong Province (now Asan, South Chungcheong Province) to avoid conflict with the crown prince. Four years later in 1283, Wang Cha was able to back to Gaegyeong and received his royal title–Duke Kangyang .

Death and afterlife Duke Kangyang died in 1308 (24th years reign of his father) and received his posthumous name, Chŏnggang along with his honorary title, Duke Chŏnggang given by his great-grandson–King Gongyang in 1391.

Although his wife is unknown, according to the remaining historical sources, Duke Kangyang had 3 sons: Wang Hu the Grand Prince Danyang who served in Yuan dynasty, Wang Ko the Prince Yeonan who was King Chungseon's trusted official, and Wang Hun the Prince Yeondeok who would become the grandfather of King Gongyang.