| Graphic |
Name |
Birth |
Death |
info |
 | Amor, Oscar | | | info |
| Arriagada Fernández, Manuel Omar | | | info |
| Bayer, Osvaldo Jorge [Osvaldo Bayer] | 1927-02-18 | | info |
| Boschi, Orlando [Orlando Vera] | | | info |
| Bramante, Osvaldo [Osvaldo Ardizzone] | 1919-11-10 | 1987-01-08 | info |
| Bruzzi, Osvaldo Antonio [Osvaldo Bruzzi] | | | info |
| Cabrera, Oscar Emilio [Oscar Cabrera] | | | info |
| Campagnale, Osvaldo Néstor [Osvaldo Campagnale] | | | info |
| Castelli, Nélida Esther [Orietta Castex] | | | info |
| Castro Zuñiga, Oscar Enrique [Oscar Castro] | | | info |
| Cirimello, Oscar [Abel Fontán] | | | info |
| D'Aniello, Orlando | | | info |
| Del Priore, Oscar [Oscar del Priore] | 1944-02-11 | | info |
| del Socorro Sosa Cordero, José Osvaldo [Osvaldo Sosa Cordero] | 1906-07-06 | 1986-09-19 | info |
| Fleitas, Odín Eduardo [Odín Fleitas] | 1914-02-01 | 1987-12-19 | info |
| Fresedo (Oscar Zito), Oscar Nicolás | 1932-08-08 | | info |
| González Castillo, Ovidio Cátulo [Cátulo Castillo] | 1906-08-06 | 1975-10-19 | info |
| Guiraldes, Marcelo [Osvaldo Cruz Montenegro] | | | info |
| Irureta, Osvaldo L. [Osvaldo Irureta] | | | info |
| Kinleiner, Oscar | 1917-02-07 | | info |
| Kopczyński, Onufry Bronisław [Sławomir Bronicz] | 1917 | 1943 | info |
| Lomuto, Pascual Tomás [Oscar Lomuto] | 1899-09-18 | 1970-01-31 | info |
| Menvielle, Omar Javier | | | info |
| Mir, Onofre Carlos | | | info |
| Moretta, Oscar | | 2012-11-13 | info |
| Moya Medina, Orison Jaime [Orison Moya] | | 2017-06-16 | info |
| Núñez, Oscar Fiorentino [Oscar Núñez] | 1928-04-23 | | info |
| Ochoa, Fernando Cesar | 1905-11-29 | 1974-03-23 | info |
| Ochorowicz, Michał | 1907-01-29 | 1998 | info |
| Ogando, Mónica Andrea [Mónica Ogando] | | | info |
| Ojeda Hidrobo, Homero [Homero Hidrobo] | 1939-10-02 | 1979-08-05 | info |
| Około-Kułak, Władysław | | | info |
| Olcese, Ricardo | | | info |
| Olivera, Alberto Daniel | 1963-11-30 | | info |
| Olmos Naranjo, Abelardo Urbano | | | info |
| Oraczewska, Janina | 1901 | 1989 | info |
| Orcesi, Esteban Héctor [Esteban Orcesi] | | | info |
| Oreste, Cayetano | | | info |
| Oro, A. T. | | | info |
| Orozco, Epifanio Severiano | | | info |
| Orrico, Alcides | 1915-04-24 | 1982-09-06 | info |
| Orsi, Maximo José | | 1972-12-19 | info |
| Ortega Sanz, Atilano | 1906-10-05 | 1948-06-26 | info |
| Ortiz, Andrés | | | info |
| Ortiz Araya, Manuel | | | info |
| Ortiz Guerrero, Manuel | | | info |
| Ortiz Villanueva, Pedro Luca [Pedro Ortiz] | 1932-02-10 | | info |
| Osés, Miguel F. [Miguel Osés] | 1884 | 1928-10-08 | info |
| Osilich Palma, Ángela Elena [Ángela Palma] | | | info |
| Ossorio, Carlos Enrique [Carlos Ossorio] | 1891-07-02 | 1951-07-02 | info |
| Ostoja, Wiktor | | | info |
| Ostuni, Ricardo | 1937-01-25 | 2013-02-21 | info |
| Otalvares, Juan José | | | info |
| Otero, Justo José | 1915-03-13 | | info |
| Otero, Ricardo Marcelino [Ricardo Otero] | | | info |
| Ottaviani, Guillermo | | | info |
| Oviedo, Héctor Raúl [Héctor Oviedo] | 1936-09-30 | | info |
| Oyarzábal, Francisco | | | info |
| Pariente, Oscar Sergio Juan [Oscar Pariente] | | | info |
| Punzi, Orlando Mario | | | info |
| Rodríguez de Mendoza, Oscar [Rodrigo Mendoza] | | | info |
| Rubistein(P. Valdez), Oscar [Oscar Rubens] | 1914-01-18 | 1984-10-06 | info |
| Salatini, Orlando | | | info |
| Salazar Martínez, Oscar | | | info |
| Santieusanio (Osvaldo De Santi), Ubaldo Pedro [Osvaldo Ramos] | 1933-05-13 | 2015-08-17 | info |
| Scaglia, Omar | | | info |
| Solaberrieta, Orlando José [Orlando Solaberrieta] | | | info |
| Sosa, Oscar Rómulo | | | info |
| Vázquez Bonini, Oscar Alberto [Oscar Vázquez] | | | info |
