[1] An ancestor of the clan, a 23rd generation descendant of King Suro and Heo Hwang-ok, was Hŏ Ki (허기; 許奇).
Emperor Xuanzong bestowed the surname "Yi" on Hŏ Ki because he helped him escape from the An Lushan Rebellion.
[2] When Yi Hŏ-ki (이허기; 李許奇) returned to Silla, King Gyeongdeok awarded him the title of "Prince of Soseong" (邵城伯).
However, Prince Gyerim (later King Sukjong) and his allies killed Yi Cha-ŭi on August 29, 1095 before it could happen.
[7] Yi Cha-gyŏm used his ties to the royal House of Wang to influence the court and purge his political opponents.