The Spanish surname Castro, found mainly in the northwestern province of Galicia, is also found in Portugal and Italy. The name Castro is of habitational origin, being derived from the name castro meaning “castle or fortress” (Latin castrum ‘fort’, ‘Roman walled city’). Early records of the name Castro in Spain include Antonia Castro of Valladolid, Spain, on December 12th 1588, and Augustin de Casto, who married Lucia Fernandez at San Pelago, Spain, on February 12th 1810, and during the Peninsula War of 1807 - 1813.