Grand Duchess Maria Nikolaevna of Russia ( `` Maria Nikolaevna Romanova '' ; Russian : Великая Княжна Мария Николаевна , -- July 17 , 1918 ) was the third daughter of Tsar Nicholas II of Russia and Tsarina Alexandra Fyodorovna ( Alix of Hesse ) .
Grand Duchess Maria Nikolaevna of Russia ( `` Maria Nikolaevna Romanova '' ; Russian : Великая Княжна Мария Николаевна , June 26 1899 -- July 17 , 1918 ) was the third daughter of Tsar Nicholas II of Russia and Tsarina Alexandra Fyodorovna ( Alix of Hesse ) .