| José Paolo Guerrero | José Paolo Guerrero |
| José Pekerman | José Pekerman |
| José Ramos Horta | José Ramos-Horta |
| José Raúl Capablanca | José Raúl Capablanca |
| José Rizal | José Rizal |
| José Rujano | Jose Rujano |
| José Sanjurjo | José Sanjurjo |
| José Saramago | José Saramago |
| José Sócrates | José Sócrates |
| Joséphine Baker | Joséphine Baker |
| Joséphine de Beauharnais | Joséphine de Beauharnais |
| Jota | Jota |
| Jotty | Jotty |
| joule | joule |
| Joule per mole | Joule par mole |
| Journal des sçavans | Journal des savants |
| Journal di Crelle | Journal für die reine und angewandte Mathematik |
| Journaled File System | JFS |
| Journey | Journey |
| Joutseno | Joutseno |
| Jouxtens-Mézery | Jouxtens-Mézery |
| Jouy | Jouy |
| Jouy-aux-Arches | Jouy-aux-Arches |
| Jovan Jovanović Zmaj | Jovan Jovanović Zmaj |
| Jowzjan | Djôzdjân |
| Joy Division | Joy Division |
| Joya de Cerén | Joya de Cerén |
| Joyce | Joyce |
| Joyeuse | Joyeuse |
| Joyeux Noël | Joyeux Noël |
| Joystick | Joystick |
| Jozef Planckaert | Joseph Planckaert |
| Jozef Tiso | Jozef Tiso |
| Jozef-Ernest van Roey | Joseph-Ernest Van Roey |
| Joánico | Joánico |
| João Alves de Assis Silva | Jô |
| João Baptista de Oliveira Figueiredo | João Baptista de Oliveira Figueiredo |
| João Café Filho | João Fernandes Campos Café Filho |
| João da Cruz e Sousa | João da Cruz e Sousa |
| João Gilberto | João Gilberto |
| João Goulart | João Goulart |
| João Guimarães Rosa | João Guimarães Rosa |
| João Moutinho | João Filipe Iria Santos Moutinho |
| João Pereira | Jamba |
| João Pessoa | João Pessoa |
| João Ricardo | João Ricardo |
| Joškar-Ola | Iochkar-Ola |
| JP | JP |
| JPEG | Joint photographic expert group |
| JPMorgan Chase | JPMorgan Chase |
| JR | JR |
| JS | JS |
| JTAG | JTAG |
| JU | JU |
| Ju jitsu | Ju-jitsu |
| Juan Alberto Barbas | Juan Barbas |
| Juan Alberto Schiaffino | Juan Alberto Schiaffino |
| Juan Antonio Ríos | Juan Antonio Ríos |
| Juan B Gutierrez | Hypertexte |
| Juan Cabanilles | Juan Cabanilles |
| Juan Caramuel y Lobkowitz | Juan Caramuel y Lobkowitz |
| Juan Carlos Ferrero | Juan Carlos Ferrero |
| Juan de Grijalva | Juan de Grijalva |
| Juan de la Cosa | Juan de la Cosa |
| Juan de Nova | Juan de Nova |
| Juan Diego Flórez | Juan Diego Florez |
| Juan Domingo Perón | Juan Perón |
| Juan Domingo Perón Sosa | Juan Perón |
| Juan Esnáider | Juan Eduardo Esnáider |
| Juan Fernandez de Heredia | Juan Fernández de Heredia |
| Juan Fernández de Heredia | Juan Fernández de Heredia |
| Juan Gimenez | Juan Gimenez |
| Juan Ginés de Sepúlveda | Juan Ginés de Sepúlveda |
| Juan Goytisolo | Juan Goytisolo |
| Juan Gris | Juan Gris |
| Juan Gutiérrez Moreno | Juan Gutiérrez Moreno |
| Juan Ignacio Molina | Juan Ignacio Molina |
| Juan José Bigas Luna | Juan José Bigas Luna |
| Juan Landázuri Ricketts | Juan Landazuri Ricketts |
| Juan Luis Guerra | Juan Luis Guerra |
| Juan Manuel de Rosas | Juan Manuel de Rosas |
| Juan Manuel Fangio | Juan Manuel Fangio |
| Juan Manuel Garate | Juan Manuel Gárate |
| Juan Manuel Mata García | Juan Manuel Mata |
