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.[2]

Cheon-gye was raised by his uncle, Yi Ja-heung in his early days[3] and appointed as a Chumil (추밀, 樞密) at the end of the Goryeo dynasty alongside received his first title, Prince Wanseong (완성군, 完城君). Although he was older than Seong-gye, it was said that he was reluctant towards him.[4] 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" (불천위, 不遷位) while later received his Posthumous name, Hyomin (효민, 孝愍) in 1871.[5]

Yi married a daughter of Bak Jong-geon (박종건) 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 (nowadays Gama-dong, Huju-ri), Hamheung. However, all were collapsed in 1866 and renamed by Song Rae-hui (송래희), a Sungkyunkwan governor while enshrined at Sedeok Temple.