Castillo

Castillo is a Spanish habitational surname derived from the Spanish word castillo meaning "castle." It is the Spanish cognate of the English surname Castle. The name originally referred to someone who lived near a castle or who worked in one, reflecting a common toponymic naming tradition across many cultures.

Etymology and Origins

The root of the surname is the Latin word castellum, meaning "fortress" or "castle." As Roman influence spread across the Iberian Peninsula, the term entered Spanish as castillo. Surnames derived from landscape features, especially fortifications, were prevalent in medieval Spain, where castles played a central role in defense and regional administration. The name Castillo thus emerged as a geographic identifier, often bestowed on families who dwelt near a prominent castle.

Distribution and Variants

Castillo is a common surname in the Spanish-speaking world, with notable frequency in Spain, Mexico, and throughout Latin America. According to the 2010 United States Census, Castillo ranked as the 93rd most common surname in the U.S., with the majority of bearers identifying as Hispanic or Latino. Variants and related names exist in other Romance languages: Castell in Catalan, Castle in English, and Castelo in Portuguese. Alternative forms include Castillos, Castel, Castello, and Castilla.

Notable Bearers

Numerous notable individuals bear the surname Castillo, including politicians, athletes, artists, and scientists. For instance, Mexican artist Frida Kahlo was born Magdalena Carmen Frida Kahlo y Calderón, her maternal surname being Castillo. Others include baseball player Luis Castillo, boxer José Luis Castillo, and Peruvian singer Eva Castillo.

• Meaning: Castle (castillo in Spanish)
• Origin: Spanish, habitational
• Usage: Spanish-speaking countries; common in the USA among Hispanic/Latino population
• Variants: Castell (Catalan), Castle (English), Castelo (Portuguese), Castilla (Spanish)