Julia Mullock (March 18, 1927 – November 26, 2017) was an American member of the former imperial family of Korea through her marriage to Yi Ku.

It was up to this time that Prince Hoieun did not reveal his identity as a member of the Korean royal family, but is said to have been living an ordinary newlywed life in Brooklyn.

[3] Mullock and Prince Gu moved into apartments at Changdeok Palace where she received the title of Grand Heir Consort Hoieun (회은황태손빈).

[4] Though unable to have children with Prince Gu, Mullock did adopt a daughter, who was born in 1959 in Seoul, Yi Eun-suk, also known as Eugenia, in 1969 with her husband.

Mullock being an official member of the Korean Imperial Household is disputed, this is due to her discovery of her exclusion from the register of the Yi Family Council.

[5] She took her adoptive daughter with her and ran her craft shop at the Plaza Hotel where she worked on her disability welfare projects until in 1995 when she left Korea for Hawai’i.

In April 2005, she visited Korea to produce a film based on her life, but it was at this time that he heard news of her ex-husband’s death.

[3] On November 26, 2017, Mullock died from old age on her deathbed at Hale Nani Rehabilitation & Nursing Center in Honolulu, Hawai’i, but it took until December 5 for the news to reach.

[6] Mullock is survived by her adoptive daughter, Yi Eugenia Eun-suk, who helped conduct the funeral and spread her mother’s ashes in the Pacific Ocean.