Quick answer
Alfonso is a boy name meaning "noble and ready".
Pronunciation: Spanish /al.ˈfon.so/; Italian /al.ˈfɔn.so/.
Meaning and history
Spanish and Italian form of Alphonsus, the Latin form of the Visigothic name * Aþalafuns meaning "noble and ready", derived from the Gothic elements aþals "noble" and funs "ready". This was the name of several kings of Spain (Asturias, León, Castile and Aragon) and Portugal, starting with Alfonso I of Asturias in the 8th century. His name was sometimes recorded in the Latin spelling Adefonsus, and on that basis it is theorized that first element might be from another source (perhaps haþus meaning "battle"). It is possible that two or more names merged into a single form.
Notes and context
Usage: spanish, italian