There are 26 -so names for baby boys. Displayed on this page are -so names 1 to 20. Alfonso was the most popular among these names in 2008. The name is primarily used in English, Italian, and Spanish, and it was followed in popularity by Alonso, which is used in Italian and Spanish. The unusual -so names are Affonso (Portuguese), Afonso (Galician and Portuguese), Alphonso (Italian and Spanish), Celso (Italian), Dacso (Hungarian), Damaso (Spanish), Fonso (Spanish), Frieso (German), Friso (Dutch and German), Hasso (German), Ildefonso (Spanish), Jesuso (Spanish), Kelso (English), Kreso (Slavic), Lekso (Czech), Maso (Italian), Miso (Czech), and Narciso (Italian, Portuguese, and Spanish). -so names are somewhat popular baby names for boys. The names rose in popularity from the 1900s up to the 1910s. At the modest height of their usage in 1910, 0.046% of baby boys were given -so names. There were 2 -so names ranked within the top 1000 baby names then. -so names have since experienced a decline in frequency. In 2008, 2 -so names listed among the top 1000, with a combined usage of 0.037%. Within all -so names, the English, Italian, and Spanish Alfonso was the most commonly used, with a ranking of #585 and a usage of 0.0199%.
| Affonso | noble and ready ... of Gothic origin and it is ... variant form of Alfonso ... |
| Afonso | noble and ready ... origin is Gothic, and its use, Galician and ... variant form of Alfonso ... |
Alfonso  585 | noble and ready ... an English, Italian, and Spanish name ... The name is of disputed origin ... |
Alonso  660 | noble and ready ... language of origin is Gothic, and it is used ... variant form of Alfonso ... |
Alphonso  | noble and ready ... origin is Gothic, and its use, Italian and ... variation of Alfonso ... |
| Celso | exalted ... language of origin is Latin and it is ... not widely used as a baby name for boys ... |
| Dacso | God is my judge, God ... of Hebrew origin and it is used mainly ... form of Daniel ... |
| Damaso | tamer ... used chiefly in Spanish and it is ... variant form of Damasus ... not listed within the top 1000 ... |
| Fonso | noble and ready ... of Gothic origin and it is used mainly ... form of Alfonso ... |
| Frieso | Frisian ... used chiefly in the German language and ... variant form of Friso ... unusual as a baby boy name ... |
| Friso | Frisian ... largely used in the Dutch and German ... derived from Germanic origins ... |
| Hasso | man from Hessen ... language of origin is Germanic and it is used ... unusual as a baby boy name ... |
| Ildefonso | battle ready ... language of origin is Gothic and it is ... name was borne by a 7th-century archbishop of ... |
| Jesuso | Yahweh is salvation ... largely used in Spanish and its ... variant of Jesus ... |
| Kelso | from Kelso ... an English name of Scots Gaelic origin ... seldom used as a baby name for boys ... |
| Kreso | cross of peace ... primarily used in Slavic and it is of ... form of Kresimir ... not in the top 1000 names ... |
| Lekso | defender of men ... mainly used in Czech and it is of Old ... variation of Alexander ... |
| Maso | twin ... mainly used in the Italian language and ... form of Thomas ... not ranked within the top 1000 ... |
| Miso | Who is like God? ... used mostly in Czech and its language of ... form of Michael ... |
| Narciso | numbness, sleep ... used mostly in Italian, Portuguese, ... Its language of origin is Old Greek ... |
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