Nicholas I (1796–1855), brother of Alexander I, reigned 1825–55. At home he pursued rigidly conservative policies, while his expansionism in the Near East led to the Crimean War.
Nicholas II (1868–1918), son of Alexander III, reigned 1894–1917. Forced to abdicate after the Russian Revolution in 1917, he was shot along with his family a year later.
Nicholas in other Oxford dictionaries
Definition of Nicholas in the US English dictionary
