Baiona is a municipality in the province of Pontevedra, in the autonomous community of Galicia, Spain. It belongs to the comarca of Vigo.

Pedro Álvarez de Soutomaior, known by the sobriquet Pedro Madruga, was a Galician nobleman and knight. He was a notable figure in Galicia where he exerted certain influence in the Portuguese court, as well as spending time in that of Castile. He was one of the leading lords who suppressed the Irmandiño peasant revolts in the 1460s, and also fought in favor of the Portuguese-backed claimant to the Castilian throne, Joanna la Beltraneja, in the War of the Castilian Succession.