1. Oliver, Issac
2. Olivier, Johann Heinrich Ferdinand
3. Olivier, Woldemar Friedrich
4. Onderdonk, Julian
5. Oost, Jacob van the Younger
6. Oostsanen, Jacob Cornelisz van
7. Orchardson, Sir William Quiller
8. Orlandi, Deodato
9. Orozco, Jose Clemente
10. Orpen, Willam
