Duke of Jinhan

Duke Jinhan or Marquess Jinhan (died 1099; born Wang Yu) was a Goryeo Royal Prince as the third and youngest son of King Munjong and Consort Ingyeong who would become the father of the future Queen Munjeong.

Early life and relative
Born as the youngest son of Munjong of Goryeo and Princess Suryeong, he was named Yu and had 2 older brothers: Wang Do and Wang Su. Wang Yu was one of Yi Ja-yeon 's grandsons, and paternal half brother or maternal first cousin to Sunjong, Seonjong, and Sukjong.

Life in the Royal court
In 1086, Wang Yu was appointed as Geomgyotaewi Susagong along with his other brothers and became Susado  in 1094 (ascension year of King Heonjong). Wang Yu was also promoted into Sangseoryeong a year later alongside given "6,000 Sik-eup" (식읍 6,000호) and "400 Sik-sil"  while honoured as Duke Jinhan.

According to the records left, Wang Yu together with others was once involved in an appeal to the king concerning their brother, Duke Buyeo's marriage. The brothers, including Duke Jinhan, Marquess Geumgwan, Marquess Byeonhan and others criticized Buyeo for his incestuous marriage to his half-sister, Princess Jeokgyeong (적경궁주, and begged their elder brother, King Seonjong to annul the marriage, but the king refused to annul the marriage.

Death and Children
In 1099 (4th years reign of King Sukjong), Duke Jinhan died and was given the name Hwasin as his Posthumous name. His elder son married Princess Daeryeong –King Sukjong's 1st daughter and became "Count Hoean", while his younger son married Daeryeong's youngest sister, Princess Boknyeong and became "Count Jingang"  in 1120. Count Hoean later died in 1126 and Count Jingang died in 1146. Meanwhile, their only sister married King Yejong–Daeryeong and Boknyeong's older brother as his 3rd wife and became known as Queen Munjeong.

Family

 * Father: Munjong of Goryeo (고려문종, 29 December 1019 – 2 September 1083)
 * Grandfather: Hyeonjong of Goryeo (고려현종, 1 August 992 – 17 June 1031)
 * Grandmother: Queen Wonhye of the Ansan Gim clan (원혜왕후김씨; d. 31 July 1022)
 * Mother: Worthy Consort Ingyeong of the Incheon Yi clan
 * Grandmother: Lady Gim, of the Gyeongju Gim
 * Grandfather: Yi Ja-yeon
 * Consorts and their Respective issue(s):
 * 1) Unknown Queen
 * 2) Wang Gi (회안백 왕기, d. 1126), Count Hoean, first son
 * 3) Wang Yeon (진강백 왕연, d. 1146), Count Jingang, second son
 * 4) Queen Munjeong of the Gaeseong Wang clan (문정왕후 왕씨, d. 23 July 1138), first daughter