There are 246 -io names for baby boys. Displayed on this page are -io names 1 to 20. Antonio was the most popular among these names in 2008. The unusual -io names are Abejundio (Spanish), Aemilio (Spanish), Akio (Japanese), Alesio (Spanish), Alessio (Italian), Alexio (Portuguese), Alfio (Italian), Alicio (Spanish), Aloisio (Portuguese), Ambroggio (Italian), Ambrogio (Italian), Ambrosio (Portuguese and Spanish), Anastagio (Italian), Anastasio (Italian), Anatolio (Italian), António (Portuguese), Arcadio (Spanish), Arcenio (Spanish), and finally Arrio. -io names are fairly popular baby names for boys. The names have been increasing in popularity since the 1900s; prior to that, they were of only occasional use. At the recent height of their usage in 2005, 0.665% of baby boys were given -io names. There were 11 -io names ranked within the top 1000 baby names then. In 2008, 10 -io names listed among the top 1000, with a combined usage of 0.589%. Within all -io names, the Italian, Portuguese, and Spanish Antonio was the most commonly used, with a ranking of #102 and a usage of 0.201%.
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| Abejundio | bee-like ... used predominantly in Spanish and ... not popular as a baby boy name ... |
| Aemilio | imitating, rivaling ... of Latin origin and it is used mainly ... variation of Emil ... |
| Akio | bright man ... origin and use are both in the Japanese ... not popular as a baby boy name ... |
| Alesio | defender of men ... origin is Old Greek, and its use, Spanish ... variant form of Alexander ... |
| Alessio | defender ... has its origins in the Old Greek language ... variant of Alexis ... |
| Alexio | defender of men ... of Old Greek origin and it is used ... variant of Alexander ... rare as a baby boy name ... |
| Alfio | noble and ready ... of Gothic origin and it is used largely ... variant form of Alfonso ... |
| Alicio | of a noble kind ... largely used in the Spanish language ... a rarely used baby name for boys ... |
| Aloisio | used mostly in the Portuguese language ... form of Aloysius ... an irregularly used baby boy name ... |
| Ambroggio | immortal, divine ... language of origin is Old Greek and it is used ... form of Ambrose ... |
| Ambrogio | immortal, divine ... language of origin is Old Greek and it is ... variant form of Ambrose ... |
| Ambrosio | immortal, divine ... used chiefly in Portuguese and ... Its origin is Old Greek ... variant of Ambrose ... |
| Anastagio | resurrection ... language of origin is Old Greek and it is used ... variation of Anastasius ... |
| Anastasio | resurrection ... has its origins in the Old Greek ... form of Anastasius ... not commonly used as a baby boy ... |
| Anatolio | sunrise, east ... largely used in the Italian language ... variant of Anatoli ... |
Antonio  102 | priceless, inestimable ... has its origins in the Latin language ... used largely in the Italian, Portuguese, ... |
| António | priceless, inestimable ... used predominantly in the Portuguese language ... variant form of Anthony ... |
| Arcadio | the region of central ... largely used in the Spanish language ... variant of Arkadios ... |
| Arcenio | virile ... of Old Greek origin and it is used ... variant of Arsenio ... not popular as a baby name for boys ... |
| Arrio | warlike ... origin is Spanish ... not popular as a baby name for boys ... not in the top 1000 names ... |
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