Jinjong

Crown Prince Hyojang (; 4 April 1719 – 16 December 1728), personal name Yi Haeng, also known by his temple name King Jinjong, was the elder son of King Yeongjo, the 21st monarch of Joseon, and the half-brother of Crown Prince Sado. In 1764, 36 years after his death, he became the adoptive father of his nephew, the future King Jeongjo. Following the establishment of the Korean Empire, he was honored as Emperor So.

Biography Yi Haeng was the first son and second child of Prince Yeoning (posthumously King Yeongjo), by one of his concubines, a former palace lady from the Hamyang Yi clan. He was born during the reign of his grandfather King Sukjong, but his birth was not made public, because his biological grandmother, Concubine Suk, had died the previous year.

In 1720, King Sukjong was succeeded by his eldest son (posthumously King Gyeongjong). As the new king was childless, his younger half-brother, Prince Yeoning, was appointed as crown prince .

Yi Haeng's biological mother, Lady Yi, died the following year.

In 1724, after the death of King Gyeongjong, Prince Yeoning was enthroned as the 21st Joseon monarch. Yi Haeng was then enfeoffed as Prince Gyeongui , and in 1725, he was appointed as crown prince.

In 1726, Yeongjo selected Lady Jo, the only daughter of Jo Mun-myeong and a niece of Jo Hyeon-myeong, as his daughter-in-law.

In 1728, Yi Haeng died in Changgyeonggung, at the age of 9, after being ill for some months. The cause of his illness is unknown.

After death In 1735, seven years after his death, his younger half-brother, Yi Seon (posthumously Crown Prince Sado), was born. In 1762, he was imprisoned in a wooden rice chest at the order of their father, King Yeongjo, and died 8 days later, leaving his legitimate son, Yi San (posthumously King Jeongjo), as the only direct heir. Yeongjo was concerned that Yi San, being Sado's child, would be branded as "the son of a criminal" and thus become ineligible to succeed to the throne, so in 1764, he decreed that Yi San would become the adopted son of the long-dead Crown Prince Hyojang.

In 1776, King Yeongjo died and Yi San succeeded him. Surprisingly, on his enthronement day, he announced to his courtiers, "I am the son of Crown Prince Sado." In spite of this, Jeongjo respected the wishes of his grandfather and honored his adoptive father as king, granting him the temple name Jinjong . Hyojang's wife, the late Crown Princess Hyosun, was also honored as queen.

Family Father: King Yeongjo (; 31 October 1694 – 22 April 1776) Grandfather: King Sukjong (; 7 October 1661 – 12 July 1720) Biological grandmother: Concubine Suk , of the Haeju Choe clan (; 17 December 1670 – 9 April 1718) Adoptive grandmother: Queen Inwon , of the Gyeongju Kim clan (; 3 November 1687 – 13 May 1757) Biological mother: Concubine Jeong , of the Hamyang Yi clan (; 1694 – 23 December 1721) Grandfather: Yi Hu-cheol Grandmother: Lady, of the Gimhae Kim clan Adoptive mother: Queen Jeongseong , of the Daegu Seo clan (; 2 January 1693 – 23 March 1757) Consort(s) and their respective issue Queen Hyosun , of the Pungyang Jo clan (; 8 January 1716 – 31 December 1751) Yi San , King Jeongjo (; 28 October 1752 – 18 August 1800), adopted son

Ancestry