Alfred Frédéric Gérard Marzorati (28 September 1881 – 11 December 1955) was a Belgian lawyer and colonial administrator.He served at the bar in Brussels, then became a magistrate in the Belgian Congo. During World War I he was a legal advisor to the Belgian forces occupying German East Africa.He was appointed royal commissioner in charge of the Belgian mandate of Ruanda-Urundi in 1919, and strongly supported the 1926 administrative union between these territories and the Belgian Congo.