First-generation ancestor of the Sangseo-gong branch of the Gwangsan Yi; a late-Goryeo figure who rose to Hallim Scholar and Left Vice Minister and was made Prince Gwangsan, with the posthumous title Chungjang
| Era | 고려 후기 |
| Clan | 광산 이씨 |
Yi Sun-baek (李珣白) was a late-Goryeo figure of the Gwangsan seat, honored as the first-generation ancestor of the Sangseo-gong branch of the Gwangsan Yi. His dates are not given in the sources checked. Wikipedia calls him an 8th-generation descendant of founder Yi Jeong (李靖) while elsewhere in the same article calling him a 7th-generation descendant, so generation counts differ between texts.
According to Wikipedia, in 1320 (King Chungsuk 7) when the retired king was exiled to Tibet after slander by a Yuan eunuch, Yi Sun-baek alone accompanied him, and for helping bring about the king's release in 1322 he rose to Hallim Scholar and Left Vice Minister (Sangseo Jwabokya). He is said to have been enfeoffed as Prince Gwangsan with the title Chungjang. This relies on accounts from the clan's side and has not been checked against the Goryeo official records.
His younger brothers Yi Suk-baek and Yi Seung-baek are counted with him as founders of the Sangseo-gong, Hallim-gong and Jehak-gong branches. The 1856 Byeongjin Grand Genealogy, published at Jeungsimsa in Gwangju, is the only grand genealogy listing the descendants of all three, and the Sangseo-gong line has counted Yi Sun-baek as generation one since. With fifth-generation Yi Seon-je and his five sons the branch spread widely and became the clan's central line. The Imo (1762) and Jeonghae (1827) genealogies also took him as generation one.
Wikipedia says he alone escorted the retired king into exile in 1320 and helped win his release in 1322. The claim that he then rose to Hallim Scholar and Left Vice Minister rests on clan-side material, so it is best compared with other records such as the Goryeosa.
Yi Sun-baek is counted as one of three brothers with Yi Suk-baek and Yi Seung-baek, who became the founders of the Sangseo-gong, Hallim-gong and Jehak-gong branches. The 1856 Byeongjin genealogy listed all three lines and fixed Yi Jeong as founder.
The Imo (1762, Gaecheonsa in Neungju, Hwasun) and Jeonghae (1827) genealogies cover the Sangseo-gong line alone with Yi Sun-baek as generation one, and the later Imja (1912) and Imjin (2013) editions also deal with that branch. The sub-branches from fifth-generation Yi Seon-je down are listed on the Gwangsan Yi page.
The location of his tomb could not be confirmed.
His descendants are said to have branched through fifth-generation Yi Seon-je and his five sons into many lines, including Iksan, Naknan, Gwangju, Yeonggwang, Neungju, Gangjin, Suncheon, Hwasun, Naju and Jindo.