| J.D. Salinger | J. D. Salinger |
| J.M. Barrie | J. M. Barrie |
| ja | yea |
| ja då | certainly |
| ja tack | yes please |
| ja visst | certainly |
| Jaan Kaplinski | Jaan Kaplinski |
| Jaan Kirsipuu | Jaan Kirsipuu |
| Jaan Kross | Jaan Kross |
| Jaana Pelkonen | Jaana Pelkonen |
| Jaap Stam | Jaap Stam |
| Jabalpur | Jabalpur |
| Jabba the Hutt | Jabba the Hutt |
| Jabber | Extensible Messaging and Presence Protocol |
| Jabbok | Jabbok |
| Jaberg | Jaberg |
| Jabir al-Ahmad al-Jabir al-Sabah | Jaber Al-Ahmad Al-Jaber Al-Sabah |
| Jabloko | Yabloko |
| jabot | jabot |
| JabRef | Jabref |
| Jacek Kuroń | Jacek Kuroń |
| Jacinto Benavente | Jacinto Benavente |
| jack | notch |
| Jack Adams Award | Jack Adams Award |
| Jack Black | Jack Black |
| Jack Brabham | Jack Brabham |
| Jack Bruce | Jack Bruce |
| Jack Charlton | Jack Charlton |
| Jack Coleman | Jack Coleman |
| Jack Dempsey | Jack Dempsey |
| Jack Hawkins | Jack Hawkins |
| Jack Johnson | Jack Johnson |
| Jack Kerouac | Jack Kerouac |
| Jack Kirby | Jack Kirby |
| Jack Lemmon | Jack Lemmon |
| Jack London | Jack London |
| Jack Lynch | Jack Lynch |
| Jack Nance | Jack Nance |
| Jack Nicholson | Jack Nicholson |
| Jack Palance | Jack Palance |
| Jack Ruby | Jack Ruby |
| Jack Russell-terrier | Jack Russell Terrier |
| Jack Sharkey | Jack Sharkey |
| Jack Shephard | Jack Shephard |
| Jack Sparrow | Jack Sparrow |
| Jack Steinberger | Jack Steinberger |
| Jack Straw | Jack Straw |
| Jack Uppskäraren | Jack the Ripper |
| Jack Vance | Jack Vance |
| Jack Warner | Jack Warner |
| Jack White | Jack White |
| Jack Williamson | Jack Williamson |
| jacka | blazer |
| Jackass | Dave England |
| jackett | cutaway |
| Jackie Arklöv | Jackie Arklöv |
| Jackie Brown | Jackie Brown |
| Jackie Chan | Jackie Chan |
| Jackie Coogan | Jackie Coogan |
| Jackie Joyner-Kersee | Jackie Joyner-Kersee |
| Jackie Stewart | Jackie Stewart |
| jackpott | jackpot |
| Jackson | Jackson |
| Jackson County | Jackson County |
| Jackson Pollock | Jackson Pollock |
| Jackson Structured Programming | Jackson Structured Programming |
| Jacksonville | Jacksonville |
| Jacksonville Jaguars | Jacksonville Jaguars |
| Jacky Ickx | Jacky Ickx |
| Jaco Pastorius | Jaco Pastorius |
| Jacob Abbott | Jacob Abbott |
| Jacob Amman | Jakob Ammann |
| Jacob Burckhardt | Jacob Burckhardt |
| Jacob Böhme | Jakob Böhme |
| Jacob Cats | Jacob Cats |
| Jacob Ellehammer | Jacob Ellehammer |
| Jacob Erlandsen | Jakob Erlandsen |
| Jacob Fugger | Jacob Fugger |
| Jacob Georg Agardh | Jacob Georg Agardh |
| Jacob Grimm | Jacob Grimm |
| Jacob Johan Anckarström | Jacob Johan Anckarström |
| Jacob Jordaens | Jacob Jordaens |
| Jacob Le Maire | Jacob Le Maire |
| Jacob Magnus Sprengtporten | Jacob Magnus Sprengtporten |
| Jacob Stainer | Jacob Stainer |
| Jacob van Campen | Jacob van Campen |
| Jacob Viner | Jacob Viner |
| Jacobimatris | Jacobian |
