Juan Alfonso Pérez de Guzmán, 6th Duke of Medina Sidonia 6th Duke of Medina Sidonia (1503–1559) Parents Doña Leonor de Zúñiga Juan Alfonso Pérez de Guzmán, 3rd Duke of Medina Sidonia Children Leonora Anna de Guzman Anna de Guzman Juan Claros de Guzmán Siblings Pedro Pérez de Guzmán, 1st Count of Olivares Enrique Pérez de Guzmán, 4th Duke of Medina Sidonia Alfonso Pérez de Guzmán, 5th Duke of Medina Sidonia Partners Ana de Aragón y Gurrea