Empress Dowager Xiao (Chinese: 蕭太后; personal name unknown) (died 7 October 951?
Not much is known about Lady Xiao's background, because she lacked a biography in the History of Liao's biographies for empresses (including posthumously honoured empresses).
(Yelü Bei's wife, also with the surname of Xiao, was posthumously honoured Empress Duanshun, and similarly lacked a biography in the History of Liao).
[1][7] It appeared that Empress Dowager Xiao was also killed in the coup, likely on the same day, because the biography of Emperor Shizong's wife, Empress Xiao Sagezhi indicated that Yelü Chage mutinied and "killed the Empress Dowager and the Emperor" while explicitly stating that Empress Xiao Sagezhi was killed the next day.
[3] In 1052, Emperor Shizong's great-grandson Emperor Xingzong, when giving greater posthumous honours to Yelü Bei, posthumously honoured both her and Yelü Bei's wife with empress titles.