前趙
劉防，新興（今山西忻州市）匈奴人。劉緑的父親，劉曜的祖父。由於劉曜是劉淵的族子，
劉防應是南匈奴羌渠單於的侄孫，持至屍逐侯單於的堂侄，劉豹的再從兄弟。318年，劉曜稱帝，追尊他為懿皇帝。
Liu defense, new (now Shanxi Xinzhou City) Huns. Green's father, Liu, Liu Yao's grandfather. Liu Yuan Liu Yao is the family as children, should be the South Hsiungnu Qiang Liu prevent drainage Chanyu's grandniece, by holding to the corpse of the Tang Zhi Hou Chanyu, Liu leopard again from brother. 318, Liu Yao emperor, Emperor Yi Zhuizun him.