Georgy Evgenievich Matsievsky (Russian: Мациевский Георгий Евгеньевич) (10 December 1880 − 23 November 1941, Harbin) was a Baikal Cossack, active participant of the White movement in Transbaikal, Lieutenant-General (1919). He took part in the Russo-Japanese War and in May 1904 Georgy Matsievsky was awarded with the Order of St. Anna of the 4th class when he together with 12 Cossacks broke through from besieged Port Arthur and delivered an important missive to the head of the Manchurian Army. Georgy Matsievsky was wounded repeatedly.