Peter (, ; died 730) was the Duke of Cantabria. While various writers have attempted to name his parentage, (for example, making him son or brother of King Erwig), early sources say nothing more specific than the chronicle of 'Pseudo-Alfonso': that he was "ex semine Leuvigildi et Reccaredi progenitus" (descended from the bloodline of Liuvigild and Reccared I). He was the father of King Alfonso I and of Fruela of Cantabria, father of Kings Aurelius and Bermudo I.