https://en.wikipedia.org/wiki/Seoul_Kang_clan
Seoul Kang clan (Korean: 서울 강씨; Hanja: 서울 姜氏) was one of the Korean clans. Their Bon-gwan was in Seoul. Their founder was Kang Soo-il.[1] His father was in the United States Army and his mother was a Korean. He became the founder of Seoul Kang clan...