Alonso Pérez de Guzmán, 7th Duke of Medina Sidonia, Spanish admiral (d. 1615)
Alonso Pérez de Guzmán y de Zúñiga-Sotomayor, 7th Duke of Medina Sidonia, GE (10 September 1550 – 26 July 1615), was a Spanish aristocrat who was most noted for his role as commander of the Spanish Armada that was to attack the south of England in 1588.