What was the first name of the Spanish conquistador Cortes, whose expedition caused the fall of the Aztec empire in the 16th century?

Hernán Cortés de Monroy y Pizarro, Marquis of the Valley of Oaxaca (1485 – December 2, 1547) was a Spanish Conquistador who led an expedition that caused the fall of the Aztec Empire and brought large portions of mainland Mexico under the rule of the King of Castile in the early 16th century. Cortés was part of the generation of Spanish colonizers who began the first phase of the Spanish colonization of the Americas.