| 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 | Lord John Russell |
| Jack Russell Terrier | Jack Russell-terrier |
| Jack Sharkey | Jack Sharkey |
| Jack Shephard | Jack Shephard |
| Jack Snipe | Dvärgbeckasin |
| Jack Sparrow | Jack Sparrow |
| Jack Steinberger | Jack Steinberger |
| Jack Straw | Jack Straw |
| Jack the Ripper | Jack Uppskäraren |
| jack up | sätta upp |
| Jack Vance | Jack Vance |
| Jack Warner | Jack Warner |
| Jack White | Jack White |
| Jack Williamson | Jack Williamson |
| jack-in-office | paragrafryttare |
| jack-in-the-box | gubben i lådan |
| jack-knife | fällkniv |
| jack-of-all-trades | tusenkonstnär |
| jackal | sjakal |
| jackanapes | snobb |
| jackaroo | gröngöling |
| jackass | dumbom |
| jackass hare | åsnehare |
| Jackass-barque | Barkentin |
| jackboots | kragstövlar |
| jackdaw | kaja |
| jackdraw | kaja |
| jacket | jacka |
| jacketing | smörj |
| 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 |
| jackknife | stor fällkniv |
| jackpot | jackpott |
| jackrabbit | åsnehare |
| jackscrew | domkraft |
| Jackson | Jackson |
| Jackson County | Jackson County |
| Jackson Guitars | Jackson |
| Jackson Pollock | Jackson Pollock |
| Jackson Structured Programming | Jackson Structured Programming |
| Jacksonville | Florida |
| Jacksonville Jaguars | Jacksonville Jaguars |
| Jacky Ickx | Jacky Ickx |
| Jaco Pastorius | Jaco Pastorius |
| Jacob | Jakob |
| Jacob Abbott | Jacob Abbott |
| Jacob Baradaeus | Jakob Zanzolus Baradaeus |
| Jacob Benjamin Wegner | Benjamin Wegner |
| Jacob Bernoulli | Jakob Bernoulli |
| Jacob Burckhardt | Jacob Burckhardt |
| Jacob Cats | Jacob Cats |
