Peter, Duke of Cantabria

Peter (died 730) was the Visigothic duke of Cantabria at the time of the Muslim conquest of Spain, said by the Chronicle of Alfonso III to descend from the Visigothic kings. When Musa ibn Nusair sacked Amaya in 714, he led his people into the northern mountains.

He backed Pelayo of Asturias's revolt and may have sent his son Alfonso to Pelayo's court after Covadonga. Alfonso married Pelayo's daughter Ermesinda, uniting Cantabria with Asturias, and later reigned as King Alfonso I. Peter was also father of Fruela of Cantabria.