Álvaro de Bazán, 1st Marquis of Santa Cruz, Spanish admiral (d. 1588)
Álvaro de Bazán y Guzmán, 1st Marquis of Santa Cruz (12 December 1526 – 9 February 1588), was a Spanish admiral and landlord.

He took part in the seizure of the rock of Vélez de la Gomera (1564), the relief to the besieged during the Great Siege of Malta (1565), the quelling of the Alpujarras Rebellion (1569), the Battle of Lepanto (1571), the conquest of Tunis (1573), the incorporation of Portugal to the Hispanic Monarchy (1580), and the conquest of Terceira (1582).He was never defeated, a remarkable achievement in a fifty-year long career. His personal galley was known as La Loba ('The She-Wolf'), after her golden figurehead. He was Grandee of Spain.