casto

Casto is a surname of Spanish origin. It is thought to derive from a given name, possibly a variant of Casto, meaning "chaste" or "pure" in Latin. Surnames of this type were often adopted as patronymics, indicating a son of someone named Casto, or as descriptive surnames referring to a characteristic of the individual or their family. The surname is found primarily in Spanish-speaking countries and communities.

Variations and related names may exist due to regional dialects and historical evolution of language. Genealogical research can often trace the lineage of families bearing the Casto surname, revealing their historical geographic locations and migratory patterns. Like many surnames, its prevalence can vary significantly by region.