Grand Duke Alexei Alexandrovich of Russia (Russian: ; 14 January [O.S. 2 January] 1850 in St. Petersburg 14 November 1908 in Paris) was the fifth child and the fourth son of Alexander II of Russia and his first wife Maria Alexandrovna (Marie of Hesse). Chosen for a naval career, Alexei Alexandrovich started his military training at the age of seven. By the age of 20 he had been appointed lieutenant of the Imperial Russian Navy and had visited all Russia's European military ports. In 1871, he was sent as a goodwill ambassador to the United States and Japan.

In 1883 he was appointed general-admiral. He had a significant contribution in the equipment of the Russian navy with new ships and in modernizing the naval ports. However, after the Russian defeat in the Battle of Tsushima in 1905, and viewed as an incompetent and corrupt dilettante, he was relieved of his command. He died in Paris in 1908.

Alexander Nevsky (Russian: Александр Невский) was a large screw frigate of the Russian Imperial Navy. The ship was designed as part of a challenge being offered by the Russian Empire to the Royal Navy, but was lost in a shipwreck in 1868 while Grand Duke Alexei, son of Tsar Alexander II, was aboard.