Answer
Nicholas II was the famous cousin of Grand Duke Nicholas Nikolaevich. Both men were members of the Romanov dynasty, which ruled Russia for centuries. Nicholas II became the last Tsar of Russia, reigning from 1894 until his abdication in 1917. Grand Duke Nicholas Nikolaevich was a prominent military commander during World War I and served as the Supreme Commander of the Russian Army from 1914 to 1915.