Crown Prince Uiso

Crown Prince Uiso (Korean의소세자; Hanja懿昭世子; 27 September 1750 - 17 April 1752[2]) or Crown Prince Successor Uiso (Korean의소세손; Hanja懿昭世孫), personal name Yi Jeong or Lee Jeong (Korean이정; Hanja李琔) 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 (Korean창흥; Hanja昌興; RRChangheung; MRJ'anghŭng).[3]

Yi Jeong, Crown Prince Uiso
이정 의소세자
Crown Prince Successor of Joseon
(조선 왕세손)
SuccessorCrown Prince Successor Yi San[1]
BornYi Jeong (이정, 李琔)
(1750-09-27)27 September 1750
Changdeok Palace, Hanseong, Kingdom of Joseon
Died17 April 1752(1752-04-17) (aged 1)
Changdeok Palace, Hanseong, Kingdom of Joseon
HouseHouse of Yi
FatherCrown Prince Sado
MotherCrown Princess Consort Hyegyeong of the Pungsan Hong clan
Crown Prince Uiso
Revised RomanizationUiso Seson
McCune–ReischauerUiso Seson
Birth name
Revised RomanizationI Jeong
McCune–ReischauerYi Chŏng


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 Changgyeong Palace Gyeongchun Hall, in Hanseong. King Yeongjo expected great things from him. 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 of Joseons,[4] from special instructions of King Yeongjo. His body was buried to the south of Mt. Ahnhyon (안현 鞍峴), Bugahyeon-dong in Hanseong.[5] King Yeongjo named his grave Uiso grave and wrote the epitaphs, erecting a tombstone.

In 1870, his grave name was Uiryong Park (의령원 懿寧園).[6] On June 7, 1949, his grave was moved to Wondang in Goyang.


  1. Brother: King Jeongjo of Joseon (28 October 1752 – 18 August 1800) (조선 정조)
    1. Sister-in-law: Queen Hyoui of the Cheongpung Kim clan (5 January 1754 - 10 April 1821) (효의왕후 김씨)
  2. Sister: Princess Cheongyeon (1754 - 9 June 1821) (청연공주)
    1. Brother-in-law: Kim Gi-Seong (? - 1811) (김기성)
  3. Sister: Princess Cheongseon (1756 - 20 July 1802) (청선공주)
    1. Brother-in-law: Jeong Jae-Hwa (1754 - 1790) (정재화)


See alsoEdit

Site LinkEdit


  1. ^ Full younger brother.
  2. ^ In Lunar calendar, he was born on 27 August 1750 and was died on 4 March 1752
  3. ^ "제--호 의소세손묘소도감의궤 상 (懿昭世孫墓所都監儀軌 上)". (in Korean). Retrieved June 26, 2021.
  4. ^ 조선왕실 장례 지침서 '국조상례보편' 국역 연합뉴스 2008.10.09. (in Korean)
  5. ^ 의소세손 의령원 부장품 (in Korean)
  6. ^ 의령원 터 Archived 2018-04-01 at the Wayback Machine (in Korean)
  7. ^ He is given the posthumous title, "Jangjo" (장조)
  8. ^ Queen Heongyeong is also known as "Lady Hyegyeong" (혜경궁).