The members of the Gwangsan Kim clan were the descendants of Heung Gwang (흥광, 興 光), who was the third prince of King Sinmu of Silla, the 45th monarch of the Silla Dynasty.
The members of the Gwangsan Kim clan were the descendants of Heung Gwang (흥광). 흥광 was 興 光. Heung Gwang (흥광) was the third prince of King Sinmu of Silla. Silla was the 45th monarch of the Silla Dynasty. 흥광 was 興 光.