Octave Denis Victor Guillonne Ottavio Leoni Octavio Mendoza Octavio Vicent Cortina Odd Nerdrum´s Odette Bruneau Odile Schwilgué Odilon Redon Odoardo Fantacchiotti Odoardo Tabacchi Ofelia Echagüe Vera Ofri Cnaani Oionockles Pintor griego Oleg Bogomolov Oleg Gurenkov Oleg Leonov Oleg Lomakin Oleg Sergeev Oleg Zhivetin Oleg Zajarevich Oleksii Gnievyshev Olga Boznanska Olga Carol Rama Olga Dorado Olga N. Fodor Olivuccio di Ciccarello da Camerino Oltos painter Omar Rayo Onatas de Aegina Onchi Koshiro Onesimos pintor griego Onofrio Gabrieli Onofrio Palumbo Onorio Marinari Ophrah Shemesh Oracio Alfani Orazio Fidani Oracio Samacchini Oraxiteles Orazio Andreoni Orazio Borgianni Orazio Cossali Orazio de Ferrari Orazio Fontana Orazio Gentileschi Orazio Riminaldi Oresegun Olumide Orlando Merlini

Ortolano Giovanni Battista Benvenuti Ortelles Ortiz de Zarate Osamu Obi Oscar Björck Oscar Hermann Lamb Oscar Kokoschka Oscar Dominguez Oscar González Cerón Oscar Muñoz Oscar Pereira da Silva Oskar Begas Oskar Bruno Zwintscher Oskar Brazda Oskar Martin-Amorbach Ossip Zadkine Oswald Birley Oswald Hornby Joseph Birley Ottaviano Nelli Ottavio Vannini Ottilie Wilhelmine Roederstein Ottmann Henry Ottmar Elliger Otto Bache Otto Dix Otto Henry Bacher Otto Franz Scholderer Otto Friedrich Otto Friedrich Carl Lendecke Otto Greiner Otto Griebel Otto Knille Otto Muller Otto Pilny Otto Ritschl Otto Rudolf Schatz Otto Schoff Otto Schubert Otto Theodore Gustav Lingner Otto van Veen Ottone Rosai Owe Zerge Oxana Yambykh Ozias Leduc