Yi Haengni

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Yi Haengni (Korean: 이행리; 李行里; 1236–?) was the great-grandfather of Yi Seonggye, the founder of the Joseon Dynasty. He was born in Wonsan, Kangwon Province, Goryeo, and died in Wonsan. He married Lady Son, who became known as Queen Jeongsuk (m. 1250), and they had nine sons and one daughter. He was the son of Mokjo of Joseon and Queen Hyogong of the Pyeongchang Yi clan.

After his death, his great-great-grandson King Taejong posthumously gave him the temple name Ikjo (익조; 翼祖). His tomb is the Jireung tomb in Anbyeon County, South Hamgyeong Province, and his wife Queen Jeongsuk is buried at Sukneung in Muncheon County, South Hamgyeong Province. He belonged to the House of Yi.