Castro

Origin & Etymology

Castro comes from the Latin ‘castrum,’ meaning fortified camp or castle, a word the Romans used for their military encampments scattered across the empire. As Roman settlements evolved into towns and cities, the Latin castrum became the Spanish and Portuguese ‘castro,’ referring to hilltop fortresses that dotted the Iberian Peninsula. The name carried over as a surname signifying those who lived near or guarded such strongholds, and in recent decades has transitioned into use as a given name.

Popularity Story

Castro as a first name remains uncommon but has grown in Latino communities as surname-to-first-name naming becomes more fashionable, following the trend of surnames like Santiago, Cruz, and Rivera entering the first-name mainstream.

Cultural Significance

Castro is deeply woven into Latin American history and identity — from the ancient Celtic-Iberian hill forts (castros) of Galicia to the Castro district of San Francisco, a historic center of LGBTQ+ culture. The name carries the enduring symbolism of strength, fortification, and community.

Fun Facts

• Castro is one of the most common surnames in Galicia, Spain and Portugal
• The Castro district of San Francisco is named after rancher José Castro
• There are hundreds of ancient Celtic-Iberian hillforts called ‘castros’ in Galicia still visible today

Castro in Other Languages