당 고조
Namsaeng's tomb stele, along with that of his brother Namgeon, has been discovered. Namsaeng's biography (Quan Nan Sheng 泉男生傳) appears in the "Xin Tangshu" (New History of Tang), book 110. The Chinese rendering of Namsaeng’s family name is Cheon (泉, Chinese Quan) rather than Yeon (淵), because Yeon (Chinese, Yuan) was the given name of Emperor Gaozu of Tang (Li Yuan 李淵), founder and first emperor of Tang, and taboo to apply to another by Chinese tradition.