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https://en.wikipedia.org/wiki/Syngman_Rhee#Early_life
Syngman Rhee was born on 26 March 1875 in Daegyeong, a village in Pyeongsan County, Hwanghae Province of Joseon-ruled Korea. Rhee was the third but only surviving son out of three brothers and two sisters (his two older brothers both died in infancy) in a rural family of modest means. Rhee's family traced its lineage back to King Taejong of Joseon, and was a 16th-generation descendant of Grand Prince Yangnyeong through his second son, Yi Heun who was known as Jangpyeong Dojeong (장평도정;長平都正). This case makes him a distant relative of the mid-Joseon military officer, Yi Sun-sin (not be confused with Admiral Yi Sun-sin). His mother is a member of Gimhae Kim clan.
https://en.wikipedia.org/wiki/Syngman_Rhee#Early_life
Syngman Rhee was born on 26 March 1875 in Daegyeong, a village in Pyeongsan County, Hwanghae Province of Joseon-ruled Korea. Rhee was the third but only surviving son out of three brothers and two sisters (his two older brothers both died in infancy) in a rural family of modest means. Rhee's family traced its lineage back to King Taejong of Joseon, and was a 16th-generation descendant of Grand Prince Yangnyeong through his second son, Yi Heun who was known as Jangpyeong Dojeong (장평도정;長平都正). This case makes him a distant relative of the mid-Joseon military officer, Yi Sun-sin (not be confused with Admiral Yi Sun-sin). His mother is a member of Gimhae Kim clan.