Princess Dowager Helan

Princess Dowager Helan (賀蘭太后, personal name unknown) (351–396), formally Empress Xianming (獻明皇后, literally "the wise and understanding empress), was, according to official history of the Xianbei-led Chinese Northern Wei dynasty, the mother of the founding emperor Emperor Daowu (Tuoba Gui). Her husband was Tuoba Gui's father Tuoba Shi (拓拔寔), the heir apparent of the Dai prince Tuoba Shiyijian (拓拔什翼犍). (However, for reasons why this account may have its problems, see here -- in particular, note below with regard to description of the parentage of Tuoba Gu (拓拔觚).)