Luis Fajardo y Ruíz de Avendaño, KOC (c. 1556 – 21 May 1617), known simply as Luis Fajardo, was a Spanish admiral and nobleman who had an outstanding naval career in the Spanish Navy. He is considered one of the most reputable Spanish militaries of the last years of the reign of Philip II and the reign of Philip III. He held important positions in the navy and carried out several military operations in which he had to fight against English, Dutch, French and Barbary in the Atlantic, the Caribbean and the Mediterranean. It is known for the conquest of La Mamora in 1614.