Another source of Deng's surname is that Li changed his surname to Deng. According to Hunan Anhua's "Deng's Genealogy", Li Yu, the queen of the Southern Tang Dynasty, once named her eighth son, Li Congying, as Deng Wang, and the Southern Tang Dynasty perished. Li Houzhu, his wife, concubines and more than 300 members of the royal family were taken to Kaifeng as conquered people. He fled from Yi Tian's son and went to Anhua to live in seclusion. In order to avoid being hunted down, he took Naifu as his surname and changed his surname to Deng. This is the second source of Deng's surname.
Extended data:
The migration of Deng's surname;
After Deng Guo was destroyed in Chu State, most people surnamed Deng still lived in their native land (already belonging to Chu State), and these adherents of Deng State were called Chu people. For them, it's just pulling out Deng Zhi, changing Chu Zhi and changing a monarch. In the Han Dynasty, due to the war and official career, the Deng family has migrated to Sichuan, Shaanxi, Guangdong, Jiangsu and other places since ancient times. For example, Deng Tong's family in the Western Han Dynasty was in Nan 'an (now Leshan, Sichuan), Deng Xian's family was in Chenggu (now Chenggu, Shaanxi), and Deng Mi's family was in Panyu (now Guangzhou, Shandong).
At the end of the Western Jin Dynasty, the Central Plains was full of soul-stirring and wars continued. Xiongnu Liu Yao led his troops to attack Chang 'an, Di Chin surrendered, and the Western Jin Dynasty perished. Si Marui established the Eastern Jin Dynasty in Jiankang. The gentry and refugees in the Central Plains were forced to emigrate to find a place to live, and most of them went to Jiangnan.
Baidu encyclopedia-Deng surname