Yi Hae-won's husband, Yi Seung-gyu, descended from the Yongin Yi clan (), according to the
Genealogy book of the clan published in 1983. • Father:
Yi Kang, Prince Imperial Ui () (30 March 1877 – 16 August 1955) • Grandfather:
Emperor Gojong () (8 September 1852 – 21 January 1919) • Grandmother: Imperial Consort Gwi-in of the
Deoksu Jang clan () • Mother: • Biological: Lady Yi Hui-chun of Sudeok Hall (); Yi Kang's 5th concubine • Adoptive:
Kim Su-deok, Princess Consort Imperial Ui () • Younger half-brother:
Yi Seok (이석, 李錫; born 3 August 1941) • Husband: Yi Seung-gyu (이승규, 李昇圭; born 4 September 1917) • Father-in-law: Yi Wan-yeong () (1895 – 1943), the only son of Yi Ju-sang (). • Mother-in-law: Lady Yi Hui-gyeong of the Hansan Yi clan (이희경, 李喜慶; born 1895), the daughter of Yi Deok-gyu (). • Children: • Son: Yi Jin-hyu (이진휴, 李鎭烋; born 24 January 1941) – married Lady Yi Ae-seon (). • Son: Yi Jin-wang (이진왕, 李鎭旺; 14 November 1945 – December 2019) – married Lady Park Jong-mi (). • Daughter: Yi Jin-ju () (11 September 1947 – 1994) – died unmarried. • Son: Yi Jin-hong (이진홍, 李鎭弘; born 24 July 1949) ==See also==