Yi An-sa

Yi An-sa (died 1274) was a Goryeo nobleman who would become the great-great-grandfather of Yi Seonggye, founder of the Joseon Dynasty.

On 28 July 1392, when Taejo made a new dynasty, he was granted the royal title King Mok. After his death in 1274, he was buried in Deokneung, Neung-ri, Gapyeong-myeon, Sinhung-gun, South Hamgyong Province, North Korea and given the temple name Mokjo by his great-great-great-grandson, King Taejong on 22 April 1411 along with his posthumous name.

Family

 * Father: Yi Yang-mu (이양무, d. 1231)
 * Grandfather: Yi-Rin
 * Grandmother: Lady, of the Nampyeong Mun clan ; oldest daughter of Mun Geuk-gyeom.
 * Mother: Lady, of the Samcheok Yi clan
 * Grandfather: Yi Gang-je
 * Younger brother: Yi Yeong-pil
 * Younger brother: Yi Yeong-mil
 * Younger brother: Yi Yeong-seup
 * Wife: Queen Hyogong of the Pyeonchang Yi clan
 * 1st son: Yi Eo-seon, Grand Prince Ancheon (이어선 안천대군, d. 1274)
 * 2nd son: Yi Jin, Grand Prince Anwon
 * 3rd son: Yi Jeong, Grand Prince Anpung
 * 4th son: Yi Haeng-ni
 * 5th son: Yi Mae-bul, Grand Prince Anchang
 * 6th son: Yi Gu-su, Grand Prince Anheung