| Oleg Penkovsky | Oleg Penkovsky |
| Oleg Petrov | Oleg Petrov |
| Oleg Protasov | Oleg Protasov |
| Oleg Protopopov | Oleg Protopopov |
| Oleg Romantsev | Oleg Romantsev |
| Oleg Ryzhenkov | Oleg Ryzhenkov |
| Oleg Salenko | Oleg Salenko |
| Oleg Serebrian | Oleg Serebrian |
| Oleg Shelayev | Oleh Shelayev |
| Oleg Taktarov | Oleg Taktarov |
| Oleg Vladimirovich Losev | Oleg Losev |
| Oleguer Presas | Oleguer Presas |
| Olekma | Olyokma River |
| Oleksandr Moroz | Oleksandr Moroz |
| Oleksandr Shovkovskiy | Oleksandr Shovkovskiy |
| Oleksandr Yatsenko | Oleksandr Yatsenko |
| Oleksiy Lukashevych | Olexiy Lukashevych |
| Olena Petrova | Olena Petrova |
| Olena Zubrilova | Olena Zubrilova |
| Olenyok | Olenyok River |
| Olesya Krasnomovets | Olesya Krasnomovets |
| Olesya Zykina | Olesya Zykina |
| Olexiy Byelik | Oleksiy Byelik |
| olfactif | olfactory |
| Olga Alexandrovna | Grand Duchess Olga Alexandrovna of Russia |
| Olga Alexandrovna de Russie | Grand Duchess Olga Alexandrovna of Russia |
| Olga Artechina | Olga Arteshina |
| Olga Bancic | Olga Bancic |
| Olga Bondarenko | Olga Bondarenko |
| Olga Bryzgina | Olga Bryzgina |
| Olga Constantinovna de Russie | Olga Konstantinovna of Russia |
| Olga Danilova | Olga Danilova |
| Olga de Russie | Grand Duchess Olga of Russia |
| Olga Fikotová | Olga Fikotová |
| Olga Karnovic Paley | Olga Valerianovna Paley |
| Olga Kern | Olga Kern |
| Olga Khokhlova | Olga Khokhlova |
| Olga Korbut | Olga Korbut |
| Olga Kotlyarova | Olga Kotlyarova |
| Olga Kuzenkova | Olga Kuzenkova |
| Olga Mineyeva | Olga Mineyeva |
| Olga Morozova | Olga Morozova |
| Olga Nazarova | Olga Nazarova |
| Olga Neuwirth | Olga Neuwirth |
| Olga Nicolaevna de Russie | Grand Duchess Olga Nikolaevna of Russia |
| Olga Nicolaïevna de Russie | Olga Nikolaevna of Russia |
| Olga Poutchkova | Olga Poutchkova |
| Olga Prekrasa | Olga of Kiev |
| Olga Preobrajenska | Olga Preobrajenska |
| Olga Pyleva | Olga Pyleva |
| Olga Rubtsova | Olga Rubtsova |
| Olga Ryabinkina | Olga Ryabinkina |
