George Maniakes (Greek: Γεώργιος Μανιάκης;[a] Italian: Giorgio Maniace; died 1043) was a prominent general of the Byzantine Empire during the 11th century.

[5] Also with him were Norman mercenaries under William de Hauteville, who earned his nickname Iron Arm by defeating the Emir of Syracuse in single combat.

Finding himself in a position of power, Sclerus used it to poison Constantine against Maniakes - ransacking his house and even seducing his wife, using the charm for which his family was famous.

Maniakes' response to Sclerus' demand that he surrender command of the Empire's forces in Apulia was to torture him brutally; sealing his eyes, ears, nose, and mouth with excrement.

In 1043 his army clashed with troops loyal to Constantine near Thessalonica, and although initially successful, Maniakes was killed in the melee after receiving a fatal wound (according to Psellus' account).