Prince Jeongyang (; d. 23 March 1397), personal name Wang U () was the only full older brother of King Gongyang and nobleman in the early

Joseon dynasty Joseon ( ; ; also romanized as ''Chosun''), officially Great Joseon (), was a dynastic kingdom of Korea that existed for 505 years. It was founded by Taejo of Joseon in July 1392 and replaced by the Korean Empire in October 1897. The kingdom w ...

since his two daughters married both of King Taejo's son and grandson. When

King U U (25 July 1365 – 31 December 1389) ruled Goryeo (Korea) as the 32nd king from 1374 until 1388. He was the only son of King Gongmin. Cultural background In the thirteenth century, Mongol forces had invaded China and established the Yuan dy ...

and King Chang were deposed from the throne and their families were exiled, U led the army and stationed in Jangdan near

Gaeseong Kaesong (, ; ) is a special city in the southern part of North Korea (formerly in North Hwanghae Province), and the capital of Korea during the Taebong kingdom and subsequent Goryeo dynasty. The city is near the Kaesong Industrial Region close ...

to prepare for emergencies. Then, after his brother's ascension to the throne, he was promoted into ''Panmunhaseongsa'' (), ''Yeongsansasa'' () and ''Jongbusisa'' () and in 1391, he became ''Yeongmunhabusa'' (). One year later,

Yi Seong-gye Taejo (; 4 November 1335 – 27 June 1408), personal name Yi Seong-gye (), later Yi Dan (), was the founder and first monarch of the Joseon dynasty of Korea. After overthrowing the Goryeo dynasty, he ascended to the throne in 1392 and abdi ...

established the new

and King Gongyang's families were exiled, but since U's daughters married both of Yi's son and grandson, so he escaped from the riots while honoured as both of Prince Majeon () and Prince Gwi of Ui () at Angam Temple () in Majeon-gun,

Gyeonggi Province Gyeonggi Province (, ) is the most populous province in South Korea. Seoul, the nation's largest city and capital, is in the heart of the area but has been separately administered as a provincial-level ''special city'' since 1946. Incheon, ...

(now Misan-myeon,

Yeoncheon County Yeoncheon County (''Yeoncheon-gun'') is a county in Gyeonggi Province, South Korea. The county seat is Yeoncheon-eup (연천읍) and sits on Gyeongwon Line, the Korail railroad line connecting Seoul, South Korea (ROK), with North Korea (DPRK). Hi ...

) where the Goryeo royal ancestor rites were held by him and his descendants. Taejo was said to enjoyed Gyeokgu () with U and explained him why he given the Joseon royal title (it wasn't that Taejo forgive him because they were in-law, but Taejo said that it was like that honoured Mija from the Ju State to Song State ('주나라에서 미자를 송나라에 봉한 것과 같다'). Also, his sons were changed their clan into maternal one (''No clan''). In 1394, U became a target for the treason case of the Wang clan which several officials insisted that he and his two sons got exiled or killed. However, King Taejo pardoned them every time on the grounds that they had to hold the Goryeo ancestral rite. After U's death in 1397 amid continued impeachment, the King personally sent a tribute and gave him a

posthumous name A posthumous name is an honorary Personal name, name given mainly to revered dead people in East Asian cultural sphere, East Asian culture. It is predominantly used in Asian countries such as China, Korea, Vietnam, Japan, Malaysia and Thailand. ...

Family

Sources: *Wife: Lady, of the

Gyoha No clan The Gyoha No clan () is a Korean clan. Its bon-gwan is Paju, Gyeonggi Province. According to census research in 2015, the number of Gyoha No clan members was 61,747. The clan's founder is , the 2nd son of , who hailed from T'ang China. No O was d ...

() – daughter of No-Yeong, Prince Sinyang (). **1st son: Wang Jo, Prince Jeonggang/Prince Gwi of Ui (정강군/귀의군 왕조, 定康君/歸義君王珇; d. 1398) – later changed into No Jo (). **2nd son: Wang Gwan (왕관, 王琯; d. 1398) – later changed into No Gwan (). **1st daughter: Lady Wang () – married Yi Bang-beon, Grand Prince Muan (무안대군 이방번, 撫安大君李芳蕃; 1381–1398) of the

Jeonju Yi clan The Jeonju Yi clan () is a Korean clan with the surname Yi. Their ''bon-gwan'' is in Jeonju, North Jeolla Province. The clan includes the House of Yi that led Joseon and the Korean Empire. Their founder was . He was Minister of Works () durin ...

. **2nd daughter: Lady Wang () – married Sim-Jeong (심정, 沈泟; d. 1418) of the Cheongsong Sim clan. **3rd daughter: Lady Wang () – married Sin Ja-geun (). **4th daughter: Lady Wang () – married Yi Deok-geun, Prince Sunnyeong (순녕군 이덕근, 順寧君李德根; d. 1412) of the

Notes

References

{{DEFAULTSORT:Jeongyang, Prince Year of birth unknown Date of birth unknown 1397 deaths 14th-century Korean people House of Wang