Huan Yanfan (桓彥範) (653–706), courtesy name Shize (士則), formally Prince Zhonglie of Fuyang (扶陽忠烈王), briefly known during the reign of Emperor Zhongzong of Tang as Wei Yanfan (韋彥範), was an official of the Chinese dynasty Tang Dynasty and Wu Zetian`s Zhou Dynasty, serving as chancellor during the reign of Emperor Zhongzon....