Grand Prince Yeongseong

Yi Cheon-gye (died 1376) or formally called Grand Prince Yeongseong, was a warrior in the late Goryeo periods who became part of the early Joseon dynasty royal family member as the second son of Yi Jachun and half elder brother to Yi Seonggye, its founder.

Cheon-gye was raised by his uncle, Yi Ja-heung in his early days and appointed as a Chumil at the end of the Goryeo period alongside received his first title, Prince Wanseong. Although he was older than Seong-gye, it was said that he was reluctant towards him. According to the records left, both Cheon-gye and his sister attempted a rebellion, but Seong-gye who know this suddenly stopped them. In 1376, a powerful man used his power to take over Cheon-gye's subordinate's wife but imprisoned under Seong-gye's command and died shortly after. In particular after his death, King Taejo posthumously granted him a sacrificial rite, and conferred the "Bulcheonwi" while later received his Posthumous name, Hyomin  in 1871.

Yi married a daughter of Bak Jong-geon from the Miryang Bak clan and had total of 5 sons and 3 daughters. It was recorded that Lady Bak's tomb is located at Chukjeon-dong, Judong Temple (now Gama-dong, Huju-ri), Hamheung. However, all were collapsed in 1866 and renamed by Song Rae-hui, a Sungkyunkwan governor while enshrined at Sedeok Temple.

Family
Consorts and their respective issue(s):
 * Father: Yi Jachun, King Hwan (20 January 1315 – 3 June 1361)
 * Paternal Grandfather: Yi Haengni, King Ikjo
 * Paternal Grandmother: Queen Jeongsuk of the Yeongheung Choe clan
 * Mother: Lady, of the Hansan Yi clan (부인 한산이씨; d. 1333)
 * Internal Princess Consort, of the Miryang Bak clan
 * Yi Ran, Prince Miryang (1357 – 5 August 1428), 1st son
 * Yi Seo, Prince Mireun, 2nd son
 * Yi Cheok, Prince Milchun ( 밀춘군 이척), 3rd son
 * Yi Seol, Prince Mirreung, 4th son
 * Yi Jong, Prince Mirseong, 5th son
 * Lady Yi, of the Jeonju Yi clan, 1st daughter
 * Married Choe Cheon-bo
 * Lady Yi, of the Jeonju Yi clan, 2nd daughter
 * Married Choe Cheon-bong
 * Lady Yi, of the Jeonju Yi clan, 3rd daughter
 * Married Tae Seok-ran