Prince Jeongwon () or formally called as Internal Prince Jeongwon (), personal name Wang Gyun () was a Goryeo Royal family member as the great-great-great-grandson of Duke Yangyang who became the father of the last monarch, Gongyang. One year later, Gyun went again to Yuan to receive Eoju () and while back, he was given the title of Count Jeongwon (). In 1355, he went to the Yuan dynasty along with Gim Jin () and went to "Harye Temple" () in Yuan in 1358 and after back became Buwongun.