| Graphic |
Name |
Birth |
Death |
info |
 | , [Bosco Ortega] | | | info |
| Aguirre Obredor, Félix Alberto | 1930-02-19 | | info |
| Amor, Oscar | | | info |
| Arriagada Fernández, Manuel Omar | | | info |
| Arzeno, Diego [Nicolas Olivari] | 1900-09-08 | 1966-09-22 | info |
| Attwell Ocantos, Carlos Raúl [Claudio Frollo] | 1897-05-05 | 1942-03-20 | info |
| Ballerini, Enrique Orlando [Enrique Ballerini] | | | info |
| Bates, Héctor Tomás Octavio [Héctor Bates] | 1894-03-22 | 1964-06-23 | info |
| Bayer, Osvaldo Jorge [Osvaldo Bayer] | 1927-02-18 | | info |
| Benedetto Oneca, Hipólito Vicente [Hipólito Oneca] | | | info |
| Boschi, Orlando [Orlando Vera] | | | info |
| Bottini, Luciano Orlando | | | info |
| Bottini, Luciano Orlando [Luciano Bottini] | | | info |
| Bramante, Osvaldo [Osvaldo Ardizzone] | 1919-11-10 | 1987-01-08 | info |
| Bruzzi, Osvaldo Antonio [Osvaldo Bruzzi] | | | info |
| Cabrera, Oscar Emilio [Oscar Cabrera] | | | info |
| Castelli, Nélida Esther [Orietta Castex] | | | info |
| Castro Zuñiga, Oscar Enrique [Oscar Castro] | | | info |
| Cirimello, Oscar [Abel Fontán] | | | info |
| Cittadino, Francisco Oscar [Francisco Cittadino] | | | info |
| Costa Oliveri, Raúl Héctor [Raúl Costa Oliveri] | 1897-06-15 | 1968-08-20 | info |
| Costa Olivieri, Raúl Héctor [Raúl Costa Olivieri] | | | 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 |
| Ellauri Obligado, Gontrán | 1885-11-22 | 1949-04-24 | info |
| Farina Ortiz, David | | | info |
| Fernández Barbieri (Fernández de Olivera), Rubén Nicolás [Tabanillo] | 1898-01-18 | | info |
| Fleitas, Odín Eduardo [Odín Fleitas] | 1914-02-01 | 1987-12-19 | info |
| Fresedo (Oscar Zito), Oscar Nicolás | 1932-08-08 | | info |
| Gdansky Orgambide, Pedro Isaac [Pedro Orgambide] | 1929-08-09 | 2003-01-19 | info |
| González Castillo, Ovidio Cátulo [Cátulo Castillo] | 1906-08-06 | 1975-10-19 | info |
| González Ortiz, Emilio | | | info |
| Guillermo Ottaviani Letrista, | | | 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 |
| Lamanna, Victor Osvaldo Aristides [Victor Lamanna] | 1912-02-20 | | info |
| Litvak, Natalio [Jorge Ocampo] | | | info |
| Lomuto, Pascual Tomás [Oscar Lomuto] | 1899-09-18 | 1970-01-31 | info |
| Menvielle, Omar Javier | | | info |
| Mir, Onofre Carlos | | | info |
| Monnier, Rodolfo Oscar [Rodolfo Monnier] | | | info |
| Moretta (h), Oscar | | | info |
| Moya Medina, Orison Jaime [Orison Moya] | | 2017-06-16 | info |
| Muñoz, Alberto Oscar [Alberto Muñoz] | | | 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 |
| 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 | | | 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 |
| 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 |
| Oviedo, Héctor Raúl [Héctor Oviedo] | 1936-09-30 | | info |
| Oyarzábal, Francisco | | | info |
| Palmeiro, Horacio Osvaldo [Horacio Palmeiro] | | | info |
| Pariente, Oscar Sergio Juan [Oscar Pariente] | | | info |
| Pietruszyńska, Anna Maria [Hanka Ordonówna] | 1902-09-25 | 1950-09-08 | info |
| Prokulski, Tymoteusz [Tymoteusz Ortym] | 1898 | 1963 | info |
| Punzi, Orlando Mario | | | info |
| Rodríguez Bonfanti, Juan de Dios Osvaldo [Alberto Echagüe] | 1909-03-08 | 1987-02-22 | info |
| Rodríguez de Mendoza, Oscar [Rodrigo Mendoza] | | | info |
| Roig Lobo, JULIO GONZALO ELIA [Gonzalo Roig] | 1890-07-20 | 1970-06-13 | info |
| Rossi, Ernesto Omar 'San Diego' [Ernesto Omar Rossi] | | | 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 |
| Scala, Enrique Osvaldo [Enrique Scala] | | | info |
| Solaberrieta, Orlando José [Orlando Solaberrieta] | | | info |
| Sosa, Oscar Rómulo | | | info |
| Torres, Hipólito Oscar [Hipólito Torres] | | | info |
| Valle, Pablo Osvaldo | 1905-05-10 | 1992-01-24 | info |
| Vázquez Bonini, Oscar Alberto [Oscar Vázquez] | | | info |
| Velazquez Childe, Delmar [Carlos Olmedo] | 1921-10-26 | 1976-03-12 | info |
| Waisburd, Jorge Omar [Jorge Waisburd] | | | info |
| Wiśniewski, Janusz [Janusz Odrowąż] | 1914-01-27 | 1984-12-25 | info |
| Zas (J. Hache), José [ZAS JOSE] | | | info |
