Yi Ku
Korean prince (1931-2005)
Yi Ku (Korean: 이구; December 29, 1931 – July 16, 2005) was a Korean prince who was head of the House of Yi from 1970 until 2005. He was a grandson of Emperor Gojong of the Joseon dynasty. Through Kuni Asahiko his maternal great-grandfather, Ku was a second-cousin to Emperor Emeritus Akihito of Japan.
Early life
Ku was born in Kitashirakawa Palace (which is currently the Akasaka Prince Classic House, formerly part of the Akasaka Prince Hotel), Kioicho, Kojimachiku, Tokyo, Japan; his parents were Crown Prince Yi Un of Korea and Yi Bangja. Ku attended the Gakushuin Peers' School in Tokyo. He later attended Centre College, Danville, Kentucky and studied architecture at Massachusetts Institute of Technology both in the U.S.
Adult life
He was employed as an architect with I.M. Pei & Assocs, Manhattan, New York from 1959 to 1964. Made stateless by Japan in 1947, Ku acquired United States citizenship in 1959 and South Korean citizenship in 1964. He married Julia Mullock (1927–2017) on 25 October 1959 at St George's Church in New York and they adopted a daughter, Eugenia Unsuk. He was a Freemason, having been initiated as a member in 1966.
After the fall of Syngman Rhee, he returned to Korea in 1963 with the help of the new president Park Chung Hee, moving into the New Building of Nakseonjae hall, Changdeokgung with his mother and wife.
“Yi Ku” enters the record as korean prince (1931-2005). Crown Archives preserves that source wording while asking what Korean, prince and 1931-2005 can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 30, 2026. The linked authority identifier is Q496421. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1931, 2005, 1970 and 1959.
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This entry incorporates text from “Yi Ku” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.