Robert Crispin (French: Crépin, died 1071), called Frankopoulos, was a Norman mercenary and the leader of a corps of his countrymen stationed at Edessa under the command of the Byzantine general Isaac Komnenos, Duke of Antioch, in the 1060s. He fought against the invading Seljuk Turks and was supposedly poisoned shortly after the Battle of Manzikert.[1]