The name Alonso is a boy's name of German, Spanish, Portuguese origin meaning "Adalfuns". Alonso is ranked #745 on our popularity charts and is often added to lists like Spanish Baby Names and discussed in our forums with posts like "build a sibset with middle names".
From the experts:
Alonso is the Spanish and Portuguese diminutive version of Alfonso, itself deriving from an old Germanic name “Adalfuns” meaning "noble and ready." Although the Italian spelling Alonzo is more popular in the US, Alonso has its own strong history. Alonso Quijano was the real name of Don Quixote—and the name of two characters in the Judy Garland musical Meet Me in St. Louis. It is also the surname of star Formula 1 driver Fernando Alonso.