Yi Ja-gyeom
Head of the Gyeongwon Yi clan, father-in-law to two kings, who rebelled in 1126 and fell
The Gyeongwon Yi clan was the foremost aristocratic lineage, repeatedly marrying into the royal house. When Injong had his confidants try to remove him, Yi and Cheok Jun-gyeong set the palace on fire and confined the king in Yi's house. He is said to have coveted the throne, believing a prophecy that a man surnamed Yi would become king. Injong won over Cheok Jun-gyeong, who seized Yi and sent him into exile; the rebellion began to shake aristocratic society.