Nicholas II (Nikolai Alexandrovich Romanov; 18 May [O.S. 6 May] 1868 – 17 July 1918) or Nikolai II was the last reigning Emperor of Russia, King of Congress Poland, and Grand Duke of Finland from 1 November 1894 until his abdication on 15 March 1917. He married Alix of Hesse (becoming known as Alexandra Feodorovna) in 1894 and had children Olga (1895), Tatiana (1897), Maria (1899), Anastasia (1901) - collectively known as the OTMA sisters - and the tsarevich Alexei Nikolaevich (1904).
https://en.wikipedia.org/wiki/Nicholas_II