What was the name of XXX mother?
Grand Duchess Xenia Alexandrovna of Russia
Grand Duchess Xenia Alexandrovna of Russia (Russian: Ксения Александровна Романова; 6 April 1875 -- 20 April 1960) was the elder daughter of Emperor Alexander III of Russia and Empress Maria Feodorovna of Russia (née Princess Dagmar of Denmark) and the sister of Emperor Nicholas II. She married her second cousin Grand Duke Alexander Mikhailovich of Russia, with whom she had seven children.
Maria Feodorovna