| Ollie | Olida |
| Olex | Opal |
| Oeby | Otwin |
| Oana | Oxy |
| Obelix | Ozi |
| Orbis | Oreo |
| Ombra | Omego |
| Oresta | Ohio |
| Oxana | Olympi |
| Onita | Orry |
| Ossie | Osiris |
| Oriana | Ozeana |
| Orca | Odi |
| Odin | Opaia |
| Otella | Otello |
| Othello | Orkus |
| Orofino | Outlaw |
| Olexo | Otilla |
| Ostia | Oddney |
| Omara | Ochill |
| Ollar | Onley |
| Ozur | Oats |
| Odessa | Onno |
| Oberon | Odyn |
| Orion | Olle |
| Orlinda | Onyx |
| Oscar | Oskar |
| Oggie | Omar |
| Olive | Oliver |
| Olivia | Otto |
| Odet | Orvan |
| Orex | Olga |
| Orlando | Olanda |
| Orcus | |
Laden ...