Grand Duke Dmitry Konstantinovich of Russia was a son of Grand Duke Konstantin Nikolayevich and a first cousin of Alexander III of Russia. He followed a military career. Although he never played any political role, as a relative of Tsar Nicholas II, he was executed by firing squad at the walls of Peter and Paul Fortress during the Russian Civil War.

Grand Duke Konstantin Nikolayevich of Russia was the Emperor's Viceroy of Poland from 1862 to 1863.