Gao Zhao
Xuanwu, once he returned to Luoyang, posthumously honored his mother Gao as an empress, and he created his maternal uncles Gao Zhao and Gao Xian (高顯), as well as his cousin Gao Meng (高猛), none of whom he had previously met, dukes. Gao Zhao, in particular, became increasingly powerful during Xuanwu's reign.