Princess Heungsu (; 1088âÂÂ1123) was a Goryeo Royal Princess as the second daughter of King Sukjong and Queen Myeongui who later married her uncle's sonâÂÂWang Jeong the Count Seunghwa (), and received "2,000 sik-eup" (ìÂÂì 2,000ø) and "300 sik-sil" ().
She firstly received her title and honor as a princess in 1102 (7th years reign of her father) and in 1105 (her eldest brother's ascension), she was given the "Sungdeok Palace" () as her own mansion. That same year, Heungsu gave birth to her first son and upon hearing this, her eldest brother sent Gim Go () on board to gave many gifts to her. According to the records that were left and found, she bore Wang Jeong two sons: Wang Gi () and Wang Jae (). Meanwhile, the princess died in 1123 (ascension year of her nephew) and her husband died seven years after her in 1130.