Alonzo \a-lon-zo, al(o)-nzo\ as a boy's name is pronounced a-LON-zoh. It is of Spanish and Italian origin. Variant of Alphonse (Old German) "ready for battle". This form is more popular than Alfonso, perhaps due to the fame of basketball celebrity Alonzo Mourning.

Alonzo has 12 variant forms: Alanso, Alanzo, Allonso, Allonzo, Allohnso, Allohnzo, Alohnso, Alohnzo, Alonso, Lon, Lonnie and Lonny.

For more information, see also related names Hildefuns and Lonzo.

A baby name that sounds like Alonzo is Alanson.