| Olga Kern | Olga Kern |
| Olga Khokhlova | Olga Khokhlova |
| Olga Konstantinovna of Russia | Olga Constantinovna de Russie |
| 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 Nikolaevna of Russia | Olga Nicolaevna de Russie |
| Olga of Kiev | Olga Prekrasa |
| Olga Poutchkova | Olga Poutchkova |
| Olga Preobrajenska | Olga Preobrajenska |
| Olga Pyleva | Olga Pyleva |
| Olga Rubtsova | Olga Rubtsova |
| Olga Ryabinkina | Olga Ryabinkina |
| Olga Samaroff | Olga Samaroff |
| Olga Savchuk | Olga Savtchouk |
| Olga Shishigina | Olga Schischigina |
| Olga Valerianovna Paley | Olga Karnovic Paley |
| Olga Yegorova | Olga Yegorova |
| Olga Zaitseva | Olga Zaitseva |
| Olga Zavyalova | Olga Savialova |
| Olga Zaytseva | Olga Zaytseva |
| Olgiate Comasco | Olgiate Comasco |
| Olgierd Zienkiewicz | Olgierd Zienkiewicz |
| Olib | Olib |
| olibanum | encens |
| Oliebol | Croustillon |
| Oliena | Oliena |
| Olifant | Olifant |
| oligarchic | oligarchique |
| oligarchy | oligarchie |
| Oligocene | Oligocène |
| Oligochaeta | Oligochaeta |
| Oligomer | Oligomère |
| Oligonucleotide | Oligonucléotide |
| oligopoly | oligopole |
| Oligotrophic | Oligotrophe |
| Olimpia | Olympia |
| Olimpia Asunción | Club Olimpia |
| Olimpia Milano | Olimpia Milan |
| Olimpiada Ivanova | Olimpiada Ivanova |
| Olimpija Ljubljana | NK Olimpija Ljubljana |
| Olimpo de Bahía Blanca | Club Olimpo |
| Olin Chaddock Wilson | Olin Wilson |
| Olinda | Olinda |
| Olingo | Bassaricyon |
| Olinia | Oliniaceae |
| olive | olive |
| Olive Baboon | Papio anubis |
| olive oil | huile d'olive |
| olive oil mill wastewater | lies d'huile |
| Olive Oyl | Olive Oyl |
| Olive shell | Olividae |
| olive tree | olivier |
| Olive-backed Euphonia | Organiste olive |
| Olive-colored | Olivier |
| Olive-headed Lorikeet | Loriquet eutèle |
| Oliveira | Oliveira |
| Oliveira de Azeméis | Oliveira de Azeméis |
| Oliveira de Frades | Oliveira de Frades |
| Oliveira do Hospital | Oliveira do Hospital |
| Olivenza | Olivenza |
| Oliver | Olivier |
| Oliver Bierhoff | Oliver Bierhoff |
| Oliver Cromwell | Oliver Cromwell |
| Oliver Heaviside | Oliver Heaviside |
| Oliver Hirschbiegel | Oliver Hirschbiegel |
| Oliver Joseph Lodge | Oliver Lodge |
| Oliver Kahn | Oliver Kahn |
| Oliver Kovačević | Oliver Kovačević |
| Oliver Neuville | Oliver Neuville |
| Oliver Plunkett | Olivier Plunket |
| Oliver Riedel | Oliver Riedel |
| Oliver Sacks | Oliver Sacks |
| Oliver Smithies | Oliver Smithies |
| Oliver St John Gogarty | Oliver St John Gogarty |
| Oliver Stone | Oliver Stone |
| Oliver Tambo | Oliver Tambo |
| Oliver Tuku Mtukudzi | Oliver Mtukudzi |
| Oliver Twist | Oliver Twist |
| Olives | Olivier |
