First Part LINEAGE OF CAPTAIN MARCOS ALONSO GARZA AND JUANA DE TREVINO The Nuevo Leon origin of the surname Garza goes back to Captain Marcos Alonso Garza, originally from the town of Lepe in the province of Huelva of the Spanish Kingdom. This ancient conqueror and Andalucian settler entered the New Kingdom of Leon at the beginning of the XVII century. His first wife, unknown until today, was Juana de Trevino, citizen of the City of Mexico, their legitimate children being Captains Pedro, Blas, and Francisco de la Garza and Diego, Captain Alonso and Commander Jose de Trevino, who adopted the maternal surname, according to the custom of the age, perhaps due to its illustrious origin and in that way perpetuating it. Marcos Alonso, the Younger, of whom wae will treat first, probably also could have been the son of Captain Marcos Alonso Garza.