Early life The future Grand Internal Prince Deokheung was born on 2 April 1530 as the 9th son of
Jungjong of Joseon and his second son with Royal Noble Consort Chang of the Ansan An clan, the daughter of An Tan-Dae () who was the member of
Uijeongbu (). He was firstly named
Yi Hwan-su () and later was changed into
Yi Cho (). Then, on 1538 (33rd year reign of his father), he honoured as
Prince Deokheung ().
Marriage and later life In 1542, the grandson of Jeong In-Ji (), Jeong Se-Ho ()'s daughter, Lady of the Hadong Jeong clan () (the future
Hadong Budaebuin) went to his house in Dojeong Palace,
Sajik-dong,
Hanseong-bu and then they were married. Later, in March 1554, both of his house and his father in-law's house were impeached by some of Ministers, but his half younger brother,
King Myeongjong defeated them. Deokheung and his wife had 3 sons and 1 daughter. He also had one concubine named Sun-Dan () and with her, he had one daughter whom named Yi Hye-Ok ().
Seonjo's ascension to the throne During his lifetime, based on Myeongjong's Annals, he was criticized for being ignorant. In 1567, his third son,
Yi Yeon, Prince Haseong () succeeded Myeongjong who died without any royal heir as the 14th King of Joseon. ==Family==