Yuan Zhen
Yuan Zhen was born in 779, around the time of Emperor Dezong's ascension to the throne. He was a 10th-generation descendant of Tuoba Shiyijian, the grandfather of Northern Wei's founder Emperor Daowu, who was posthumously honored Emperor Zhaocheng after Northern Wei's founding. Yuan Zhen's male ancestor line was renamed Yuan, from Tuoba, when Emperor Xiaowen changed Xianbei names to Han names in 496. Subsequently, ancestors of Yuan Zhen's served as officials of Sui Dynasty and Tang Dynasty. His grandfather Yuan Fei () served as a county secretary general, while his father Yuan Kuan () served as a low-level official at the ministry of justice, as well as secretary to an imperial prince.