Aegidius (died 464 or 465) is a Gallo-Roman warlord of northern Gaul.

He had been promoted as magister militum in Gaul under Aëtius around 450.

An ardent supporter of Majorian, Aegidius rebels when Ricimer deposes Majorian, engaging in several campaigns against the Visigoths and creating a Roman rump state that comes to be known as the Domain of Soissons.

After winning an important victory over the Visigoths he dies suddenly, and is succeeded by his son Syagrius.

Ralph Mathisen points out the name of Aegidius' son, Syagrius, "would suggest that he was related to the Syagrii of Lyons, one of the oldest, most aristocratic families of Gaul.

Aegidius, in fact, has been proposed as a grandson of Flavius Afranius Syagrius, consul in 382".

Other Syagrii Mathisen lists with a connection to Gaul are a great-grandson of Afranius, who had an estate at Taionnacus near Lyons, and a wealthy Syagria of Lyons who was described by Magnus Felix Ennodius as thesaurus ecclesiae.