Prince Eunsin

Prince Eunsin (; 11 January 1755 – 29 March 1771 ), personal name Yi Jin , was a Korean prince, as the fourth son of Crown Prince Sado, and his concubine, Royal Noble Consort Suk of the Buan Im clan.

He later become the heir of Prince Yeollyeong, the younger half-brother of King Gyeongjong and King Yeongjo.

Biography Prince Eunsin was the second illegitimate son of Crown Prince Sado, born to Royal Noble Consort Suk of the Buan Im clan.

In 1762, when his father was executed by King Yeongjo for treason, he was left unprotected and in poverty. He and his brother, Prince Euneon, had to borrow money from merchants and from Hong Bong-han, the father of Crown Prince Sado's primary wife, and over time, the two accumulated a substantial debt.

In 1769, Prince Eunsin married Lady Hong of Namyang (1755–1829), daughter of an official named Hong Dae-hyeon. They had no issue.

On February 2, 1771, King Yeongjo sent him to exile in Daejeong, on Jeju Island. Less than two months later, on March 29, he became sick from an epidemic and died, at the age of 16.

Aftermath In 1776, according to the will of King Yeongjo, King Jeongjo, the prince's older brother, posthumously appointed him to be the heir to Prince Yeollyeong, who was his great-uncle.

On December 12, 1779, he was given the posthumous name "Somin" ; it was changed to "Chungheon" on February 28, 1871.

In 1815, during the reign of King Sunjo, Yi Chae-jung , a fifth-great-grandson of King Injo, was appointed to be Prince Eunsin's adopted son. He was given a new name, Yi Gu , and received the title Prince Namyeon (; 1788–1836).

Prince Namyeon was, through his fourth son, Heungseon Daewongun, the biological grandfather of Emperor Gojong of Korea.

Family Father: Crown Prince Sado (; 13 February 1735 – 12 July 1762) Mother: Biological: Royal Noble Consort Suk of the Buan Im clan (?–1773) Legal: Queen Heongyeong of the Pungsan Hong clan (; 6 August 1735 – 13 January 1816)

Consort and issue Lady Hong of the Namyang Hong clan (; 1755 – 21 March 1829) – No issue.