Alejandro is the Spanish form of Alexander, from the Greek Alexandros, which means "defender of men" or "defending men". It has been a classic in Spain and Latin America for centuries and is one of the most common Spanish names in the United States. Alejandro was a top 100 name in the US in 2000 and 2001, peaking at number 88; it has held steady around number 200 for the last decade and ranks number 195 in 2025.