Crown Prince Uiso

Crown Prince Uiso (27 September 1750 – 17 April 1752) or Crown Prince Successor Uiso, personal name Yi Jeong was a Joseon Crown Prince as the son of Crown Prince Sado and Crown Princess Consort Hyegyeong and was third in line of succession to the throne to King Yeongjo. He was the older brother of King Jeongjo. His Chinese name was Changheung.

Biography
His mother, Lady Hyegyeong, of Pungsan was from a famous royal family line. His maternal grandfather was Hong Bong-han, whose younger brother was Hong In-han, a minister and later Prime Minister of that time.

He was the first grandson of the 21st King Yeongjo of Joseon and his father, Crown Prince Sado, was the illegitimate second son of King Yeongjo. King Yeongjo's first son, Crown Prince Hyojang, died at the age of 10, leaving Crown Prince Sado as King Yeongjo's only male descendant. King Yeongjo hoped for another son but instead bore only daughters.

Uiso's father Crown Prince Sado had a severe mental illness and was often at odds with his father, King Yeongjo. Crown Prince Sado favoured the political party Soron, while King Yeongjo supported the ruling party Noron. Later King Yeongjo had his son, Crown Prince Sado, executed by locking him in a rice chest and starving him.

On September 27, 1750, he was born in Gyeongchungung, Changgyeong Palace, Hanseong, Joseon. On May 13, 1751 King Yeongjo declared him the political heir.

In November 1751, his aunt Lady Hyeonbin died, then soon after on 17 April 1752, Crown Prince Uiso died Tongmyongjeon. His grandfather, King Yeongjo took the deaths hard and severed from psychological trauma for some time.

He was given a state funeral, from special instructions of King Yeongjo. His body was buried to the south of Mt. Ahnhyon (안현 鞍峴), Bugahyeon-dong in Hanseong. King Yeongjo named his grave Uiso grave and wrote the epitaphs, erecting a tombstone.

In 1870, his grave name was Uiryong Park. On June 7, 1949, his grave was moved to Wondang in Goyang.

Family

 * Father: King Jangjo of Joseon (13 February 1735 – 12 July 1762)
 * Grandfather : King Yeongjo of Joseon (31 October 1694 – 22 April 1776)
 * Grandmother : Royal Noble Consort Yeong of the Jeonui Lee clan (15 August 1696 – 23 August 1764)
 * Mother: Queen Heongyeong of the Pungsan Hong clan (6 August 1735 – 13 January 1816)
 * Grandfather : Hong Bong-han (1713–1778)
 * Grandmother : Lady Lee of the Hansan Lee clan (1713–1755)
 * 1) Brother: King Jeongjo of Joseon (28 October 1752 – 18 August 1800)
 * 2) Sister-in-law: Queen Hyoui of the Cheongpung Kim clan (5 January 1754 – 10 April 1821)
 * 3) Sister: Princess Cheongyeon (1754 – 9 June 1821)
 * 4) Brother-in-law: Kim Gi-seong (?–1811)
 * 5) Sister: Princess Cheongseon (1756 – 20 July 1802)
 * 6) Brother-in-law: Jeong Jae-hwa (1754–1790)