| Obe | Obi |
| Ocean | Océan |
| Octave | Odiel |
| Odin | Oguz |
| Oguzhan | Oisin |
| Okan | Olaf |
| Ole | Oliver |
| Olivier | Oliwier |
| Olsen | Omar |
| Omer | Onno |
| Onur | Opoku |
| Orazio | Orçun |
| Orhan | Orion |
| Orlando | Orvil |
| Oscar | Oskar |
| Osman | Ossama |
| Ossian | Othman |
| Othmane | Otis |
| Otman | Otto |
| Otto-Jan | Ouail |
| Oualid | Ouassim |
| Oumar | Oumarou |
| Ousmane | Oussama |
| Owen | Ozan |
| Ozias |
| Voeg zelf een naam toe |
