Yi Haengni (; 1236–?) was the great-grandfather of Yi Seonggye, the founder of the Joseon Dynasty.
After his death, he was given the temple name Ikjo () by his great-great-grandson, King Taejong and his tomb was located in Jireung, Anbyeon County, South Hamgyeong Province. Meanwhile, his wife, Queen Jeongsuk was buried in Sukneung, Muncheon County, South Hamgyeong Province.
Family Father: Yi Ahn-sa, King Mokjo of Joseon (조선 목조; 1204–1274) Grandfather: Yi Yang-mu, Prince Sangjang (; 1186–1231) Grandmother: Lady Yi of the Samcheok Yi clan (; 1282–?) Mother: Queen Hyogong of the Pyeonchang Yi clan (; 1207–?) Grandfather: Yi Gong-suk (; 1176–?) Grandmother: Lady Jeong, Princess Consort Dolsan (; 1180–?) Wives and their Children(s): Lady Son () Yi An or Yi Gyu-su, Grand Prince Hamnyeong (이안 or 이규수 함녕대군; 1250–?) Yi Jang or Yi Bok, Grand Prince Hamchang (이장 or 이복 함창대군; 1253–?) Queen Jeongsuk of the Dongju Choe clan (; 1232 – 20 September ?) Yi Song, Grand Prince Hamwon (이송 함원대군; 1256–?) Yi Won, Grand Prince Hamcheon (이원 함천대군; 1260–?) Yi Go-tae, Grand Prince Hamneung (이고태 함릉대군; 1263–?) Yi Chun, King Dojo of Joseon (조선 도조; 1265–1342) Yi Jeon, Grand Prince Hamyang (이전 함양대군; 1267–?) Princess Anui (안의공주; 1269–?) Yi Eung-sin (이응신; 1270–?) Yi Eung-geo, Grand Prince Hamseong (이응거 함성대군; 1274–?)
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