After his death in 1970, Yi Un is alternatively known as Crown Prince Uimin (의민태자), a posthumous name given by the Jeonju Lee Royal Family Association. The
clan (순헌황귀비 엄씨; 2 February 1854 – 20 July 1911) Yi Un, Crown Prince Uimin (의민태자 이은; 20 October 1897 – 1 May 1970), ninth son Yang Chun-gi (양춘기), Imperial
(고종황제; 8 September 1952 – 21 January 1919) Son Yi Eun, Crown Prince Uimin (이은 의민태자; 20 October 1897 – 1 May 1970) Daughter-in-law: Princess Masako Nashimoto