Princess Gyeongsuk

Princess Gyeongsuk was a Joseon Dynasty Princess. She was the daughter of Munjong of Joseon and Consort Sa-Chik of the Yang clan. She was born as the only illegitimate issue of King Munjong who survived infancy and her mother, Lady Yang was the only Crown Prince's concubine recorded with the title Sa-chik, which was the old term for the title Su-chik.