Octave Denis Victor Guillonne Ottavio Leoni Octavio Mendoza Octavio Vicent Cortina Odoardo Tabacchi Odile Schwilgué Odilon Redon Odd Nerdrum´s Odoardo Tabacchi Ofelia Echagüe Vera Ofri Cnaani Oionockles Pintor griego Oleg Leonov Oleg Zhivetin Oleg Zajarevich Olga Carol Rama Olga Dorado Oltos painter Omar Rayo Onatas de Aegina Onesimos pintor griego Onofrio Gabrieli Onofrio Palumbo Onorio Marinari Ophrah Shemesh Oraxiteles Orazio Andreoni Oracio Alfani Orazio Borgianni Orazio de Ferrari Orazio Gentileschi Orazio Lomi Orazio Riminaldi Oracio Samacchini

Ortolano Giovanni Battista Benvenuti Ortelles Ortiz de Zarate Oscar Björck Oscar Hermann Lamb Oscar Kokoschka Oscar Dominguez Oscar González Cerón Oscar Muñoz Oscar Pereira da Silva Oskar Bruno Zwintscher Oskar Brazda Oskar Martin-Amorbach Ossip Zadkine Ottavio Vannini Ottmann Henry Otto Dix Otto Henry Bacher Otto Franz Scholderer Otto Friedrich Otto Greiner Otto Griebel Otto Knille Otto Muller Otto Pilny Otto Schoff Otto Schubert Otto Theodore Gustav Lingner Otto van Veen Ottone Rosai Oxana Yambykh Ozias Leduc