怡亲王
Colonel Prince Yi Geon (October 28, 1909 – December 21, 1991), also Ri Ken and , was a Korean prince and a cavalry officer in the Imperial Japanese Army during World War II. The first son of Prince Yi Kang of Korea by Lady Jeong, he was a grandson of Emperor Gwangmu. His Korean name was Yi Geon ( "I Geon"), and his birth name was Yonggil ( "Yonggil").