| Roentgen rays | rayos X |
| roentgenium | roentgenio |
| Roer | Departamento del Roer |
| Roeselare | Roeselare |
| Roetgen | Roetgen |
| Roff | Roff |
| Rogaland | Rogaland |
| Rogelio Domínguez | Rogelio Antonio Domínguez |
| Roger | Rogelio |
| Roger Bacon | Roger Bacon |
| Roger Casement | Roger Casement |
| Roger Corman | Roger Corman |
| Roger Crozier Saving Grace Award | Trofeo Roger Crozier |
| Roger de Flor | Roger de Flor |
| Roger De Vlaeminck | Roger De Vlaeminck |
| Roger Ebert | Roger Ebert |
| Roger Federer | Roger Federer |
| Roger Garaudy | Roger Garaudy |
| Roger García Junyent | Roger Garcia Junyent |
| Roger Glover | Roger Glover |
| Roger Guillemin | Roger Guillemin |
| Roger I of Sicily | Rogelio I de Sicilia |
| Roger II of Sicily | Rogelio II de Sicilia |
| Roger III of Sicily | Roger III de Foix |
| Roger Joseph Boscovich | Rogelio José Boscovich |
| Roger Martin du Gard | Roger Martin du Gard |
| Roger Meddows-Taylor | Roger Meddows-Taylor |
| Roger Milla | Roger Milla |
| Roger Moore | Roger Moore |
| Roger of Canne | Roger de Canne |
| Roger of Hoveden | Roger de Hoveden |
| Roger of Lauria | Roger de Lauria |
| Roger Penrose | Roger Penrose |
| Roger Taylor | Roger Taylor |
| Roger Vadim | Roger Vadim |
| Roger Waters | Roger Waters |
| Roger Wolcott Sperry | Roger Wolcott Sperry |
| Roger Zelazny | Roger Zelazny |
| Roger-Bernard III of Foix | Roger Bernardo III de Foix |
| Rogerius of Apulia | Roger de Apulia |
| Rogier van der Weyden | Roger van der Weyden |
| rogue | bandido |
| Roguelike | Roguelike |
| roguery | picardía |
| roguish | picaresco |
| Rogério Ceni | Rogério Ceni |
| Roh Moo-hyun | Roh Moo-hyun |
| Roh Ogura | Roh Ogura |
| Rohan | Rohan |
| Rohirrim | Rohirrim |
| Rohonc Codex | Codex Rohonczi |
| Rohr | Rohr |
| Rohr im Burgenland | Rohr |
| Rohr in Niederbayern | Rohr |
| Rohrbach | Rohrbach |
| Rohrbach in Oberösterreich | Rohrbach |
| Roi fainéant | Reyes holgazanes |
| roil | enturbiar |
| roisterer | juerguista |
| roistering | estrepitoso |
| Rojas Partido | Rojas |
| Rokeby Venus | Venus del espejo |
| Rokk í Reykjavík | Rokk í Reykjavík |
| Roko Ukić | Roko Leni Ukić |
| Rokusho | Carbonato de cobre |
| Roland | Roldán |
| Roland Barthes | Roland Barthes |
| Roland Corporation | Roland |
| Roland Deschain | Roland Deschain |
| Roland Emmerich | Roland Emmerich |
| Roland Freisler | Roland Freisler |
| Roland Garros | Roland Garros |
| Roland Joffé | Roland Joffé |
| Roland Mark Schoeman | Roland Schoeman |
| Roland Ratzenberger | Roland Ratzenberger |
