'Grand Internal Prince Deokheung'), known before as Prince Deokheung (덕흥군; 德興君) before becoming Daewongun, personal name Yi Cho (이초; 李岹)[citation needed] was a royal family member of the Joseon period and the first Daewongun in Korean.
[4][5] 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 (안탄대) who was the member of Uijeongbu (의정부).
In 1567, his third son, Yi Yeon, Prince Haseong (이연 하성군) succeeded Myeongjong who died without any royal heir as the 14th King of Joseon.
In 1 November 1569 (2nd year reign of his son), he and his wife, as the biological parents of the King were given royal title from Prince Deokheung become Grand Internal Prince Deokheung (덕흥대원군; 德興大院君) and from Princess Consort Hadong become Grand Internal Princess Consort Hadong (하동부대부인; 河東府大夫人).
Deokheung later died on 14 June 1559 and was buried in San 5–13, Deoksong-ri, Byeolnae-myeon, Namyangju-si, Gyeonggi Province, South Korea (Surak Mountain?).