Crown Prince Gyeongjang

Prince Gyeongjang was a Goryeo Royal Family member as the third son of Wang Uk and a grandson of Wang Geon, its founder.^[4] He was the full brother of King Seongjong, Queen Heonae, and Queen Heonjeong.^[5] Since their parents had died when he was young, he was raised by his paternal grandmother, Queen Sinjeong alongside his other siblings.^[6][7] Although his wife was not recorded, he had a daughter who would become the fifth wife of King Hyeonjong.^[8][9]

Prince Gyeongjang
Prince Hwangjuwon[1] (황주원낭군, 黃州院郎君)[2]
Born	? Gaegyeong, Kingdom of Goryeo
Died	? Gaegyeong, Kingdom of Goryeo
Issue	Queen Wonyong[3]
House	House of Wang
Father	Daejong of Goryeo
Mother	Queen Seonui
Religion	Buddhism
Korean name
Hangul	경장태자
Hanja	敬章太子
Revised Romanization	Gyeongjang Taeja
McCune–Reischauer	Kyŏngch'ang Ta'ech'a

References

1. Held this title at age about 15-16 years old in 976? not long after his second older brother's ascension to the throne.
2. 韓國人物史硏究 [Korean Research History] (in Korean). Jingren Cultural Society. 2006. p. 86. Retrieved June 24, 2021.
3. Bum-su, Choi (1996). 이야기 고려 왕조사 [The History of Annals of the Goryeo Dynasty] (in Korean). University of California: Cheong-ah Publishing House. p. 371. ISBN 9788936800666. Retrieved June 24, 2021.
4. "고려 제 1대 태조 가계도". m.blog.naver.com (in Korean). Naver. September 19, 2012. Retrieved June 24, 2021.
5. "고려ㅡ제6대 대왕 成宗 文懿大王 성종 문의대왕". Naver (in Korean). Apr 10, 2021. Retrieved June 24, 2021.
6. Young-kyoo, Park (2000). 한권으로읽는고려왕조실록 [Annals of the Goryeo Dynasty in one volume] (in Korean). University of Michigan: Deullyeok. p. 98. ISBN 9788975271540. Retrieved June 24, 2021.
7. Sung-hee, Jeong (Feb 15, 2007). 이야기 고려왕조사 [The History of Goryeosa] (in Korean). University of Michigan: Cheonga Publishing House. p. 438,853,856. ISBN 9788936803605. Retrieved June 23, 2021.
8. Young-kyoo, Park (2000). 한권으로읽는고려왕조실록 [Annals of the Goryeo Dynasty in one volume] (in Korean). University of Michigan: Deullyeok. p. 198. ISBN 9788975271540. Retrieved June 24, 2021.
9. "고려시대 史料 Database". db.history.go.kr (in Korean). Retrieved June 24, 2021.