Nicholas Romanov may refer to: Nicholas I of Russia (1796–1855), third son of Paul I & Tsaritsa Maria Fedorovna; younger brother of Alexander I, ascended 1825 Nicholas Alexandrovich, Tsesarevich of Russia (1843–1865), eldest son of Emperor Alexander II and Tsaritsa Maria Alexandrovna; grandson of Nicholas I Nicholas II of Russia (1868–1918), eldest son of Alexander III and Tsaritsa Maria Fedorovna, great-grandson of Nicholas I, ascended 1894 Grand Duke Nicholas Konstantinovich of Russia (1850–1918), eldest son of Grand Duke Constantin Nicolaievich and Alexandra Josifovna of Saxe-Altenburg Grand Duke Nicholas Nikolaevich of Russia (1831–1891), third son of Emperor Nicholas I and Tsaritsa Alexandra Fedorovna, husband of Alexandra Petrovna Grand Duke Nicholas Nikolaevich of Russia (1856–1929), son of Grand Duke Nicholas Nicolaievich and Alexandra Petrovna of Oldenburg, husband of Anastasia Nicolaievna Grand Duke Nicholas Mikhailovich of Russia (1859–1919), eldest son of Grand Duke Mikhail Nicolaievich and Olga Fedorovna of Baden, unmarried Prince Nicholas Romanov (1922–2014), used the contested titulary Prince Nicholas of Russia