The birth of modern hapkido can be traced to the efforts of a group of Korean nationals in the post Japanese colonial period of Korea, Choi Yong-Sool (1904–1986) and his most prominent students; Seo Bok-Seob, the first student of the art; Ji Han-Jae (born 1936), one of the earliest promoters of the art; Kim Moo-Hong, a major innovator; Myung Jae-Nam, a connector between the art of hapkido and aikido, Myung Kwang-Sik the historian and ambassador, all of whom were direct students of Choi or of his immediate students.

This information, and more about Hapkido, can be found at the following Wikipedia link; http://en.wikipedia.org/wiki/Hapkido