| Name | Meaning | Origin |
|---|
| Alo | Spiritual guide. | Native American Baby Names |
| Argo | Name of Jason's ship. | Greek Baby Names |
| Argos | All seeing. | Greek Baby Names |
| Ario | Warlike; fierce. | Spanish Baby Names |
| Arla | and Charlene. | English Baby Names, American Baby Names |
| Arlee | Promise. | Hebrew Baby Names |
| Arles | Pledge. | Hebrew Baby Names, Scandinavian Baby Names |
| Arlie | Promise. | English Baby Names, Hebrew Baby Names, American Baby Names |
| Arlo | Fortified hill. | English Baby Names, Italian Baby Names, Latin Baby Names, Spanish Baby Names, American Baby Names |
| Arno | The eagle rules; strong as an eagle. Famous Bearer: Movie star and producer/directer Arnold Schwarzennegger. | German Baby Names, American Baby Names |
| Aros | From the river's mouth. | Norse Baby Names |
| Arto | Bear; rock. | Celtic Baby Names |
| Aryo | Warlike; fierce. | Spanish Baby Names |
| Carlo | Strong. | French Baby Names, Italian Baby Names, Spanish Baby Names, American Baby Names |
| Carlos | Strong. | French Baby Names, Spanish Baby Names, American Baby Names |