Đại Việt sử ký toàn thư"Former Southern Emperor Lý" text: "帝姓李，諱賁，龍興太平人也。其先北人，西漢末苦於征伐避居土，七世遂爲南人。" translation: "The Emperor's surname is Lý, taboo name Bí/Bôn, he was a man from Long Hưng, Thái Bình . His ancestors were northerners. At the end of the Western Han era, they fled conquests and massacres [then] dwelt [in this] land. By the seventh generations they became through-and-through southerners."
Đại Việt sử ký toàn thư "Latter Southern Emperor Lý" text: "帝姓李，諱佛子，前南帝族將也。" "The Emperor's surname is Lý, taboo name Phật Tử, he was a general from the clan of the Former Southern Emperor Lý"
