| jirafa | giraffa |
| Jiraiya | Jiraiya |
| Jiri Welsch | Jiří Welsch |
| jirón | brandello |
| Jirō Taniguchi | Jiro Taniguchi |
| jiu-jitsu | jujutsu |
| Jiuzhaigou | Valle del Jiuzhaigou |
| Jive | Jive |
| jiñar | liberarsi |
| JJ | JJ |
| JK Kalev Tallinn | Kalev |
| JK Maag Tammeka | Maag Tammeka Tartu |
| JK Narva Trans | Trans Narva |
| JK Vaprus Pärnu | Vaprus Pärnu |
| JK Viljandi Tulevik | Tulevik Viljandi |
| JMX | Java Management Extension |
| Jnum | Khnum |
| Jo Bonnier | Jo Bonnier |
| Jo Siffert | Jo Siffert |
| Joachim | Gioacchino |
| Joachim du Bellay | Joachim du Bellay |
| Joachim Murat | Gioacchino Murat |
| Joachim Peiper | Joachim Peiper |
| Joachim von Ribbentrop | Joachim von Ribbentrop |
| Joan Baez | Joan Baez |
| Joan Blaeu | Joan Blaeu |
| Joan Chen | Joan Chen |
| Joan Clos | Joan Clos |
| Joan Crawford | Joan Crawford |
| Joan Crespí Fiol | Juan Crespi |
| Joan de Arcadia | Joan of Arcadia |
| Joan Enric Vives | Joan Enric Vives Sicília |
| Joan Enric Vives Sicília | Joan Enric Vives Sicília |
| Joan Fontaine | Joan Fontaine |
| Joan García Oliver | Juan García Oliver |
| Joan Miró | Joan Miró |
| Joan Sutherland | Joan Sutherland |
| Joan Verdú | Joan Verdú |
| Joanne Woodward | Joanne Woodward |
| Joao Fernando Nelo | Fernando Baiano |
| Joaquim Machado de Assis | Machado de Assis |
| Joaquin Chapaprieta | Joaquín Chapaprieta |
| Joaquín | Gioacchino |
| Joaquín Almunia | Joaquín Almunia Amann |
| Joaquín Crespo | Joaquín Crespo |
| Joaquín de Fiore | Gioacchino da Fiore |
| Joaquín Murat | Gioacchino Murat |
| Joaquín Navarro-Valls | Joaquín Navarro-Valls |
| Joaquín Phoenix | Joaquin Phoenix |
| Joaquín Rodrigo | Joaquín Rodrigo |
| Joaquín Sabina | Joaquín Sabina |
| Joaquín Sánchez Rodríguez | Joaquín |
| Joaquín Turina | Joaquín Turina |
| Joaquín-Federico I de Brandeburgo | Gioacchino III Federico di Brandeburgo |
| Job Control Language | Job Control Language |
| Jocasta Nu | Jocasta Nu |
| Jocelyn Bell Burnell | Jocelyn Bell |
| Jochen Rindt | Jochen Rindt |
| jochi colorado | aguti |
| jockey | jockey |
| jocoserio | semiserio |
| jocosidad | spiritosaggine |
| jocoso | faceto |
| jocundo | attivo |
