Castro surname meaning

Castro is a place surname built from castro, a word for a castle, fortress, or fortified settlement, ultimately related to Latin castrum. It could describe someone who lived beside a fortification or came from one of the many Iberian places whose name preserved that landmark. Galician, Portuguese, and Spanish records all carry the form, and De Castro makes the geographic relationship especially visible. A castle-based surname does not prove aristocratic descent: ordinary residents could be identified by a nearby structure or locality. Castel and related spellings may appear in connected records, but each family’s paper trail still matters. The catalog type is place, with high confidence in the core landmark meaning.