http://tvtropes.org/pmwiki/pub/images/jackson_four.JPG
[[caption-width:159:Let me introduce [[TheSimpsons Captain Jack]], [[{{Torchwood}} Captain Jack]], [[PiratesOfTheCaribbean Captain Jack]] and... [[MasterAndCommander er... I always forget his name...]]]]

-> Jack Nicholson's an actor, and Jack Black, he rocks for laughs. \\
Jack Skellington's the pumpkin king with jolly epitaphs. \\
Bruce Campbell played Jack Stiles, who was the "Jack Of All Trades".\\
And Jackie Chan did his own stunts while juggling live grenades.
-->-- ''TheGreatLukeSki, "You Don't Know Jack"''

->'''Barbossa:''' Why thank you, Jack. \\
'''Jack Sparrow:''' You're welcome. \\
'''Barbossa:''' Not you! WeNamedTheMonkeyJack.
-->-- ''[[PiratesOfTheCaribbean Pirates Of The Caribbean: The Curse Of The Black Pearl]]''

->"Jack and Jill, Jack and the Beanstalk, Jack Be Nimble, Jack Spratt... were all MotherGoose's friends named Jack?"
-->-- Billy, ''TheFamilyCircus''

Not a lot of real people have it, but many, ''many'' fictional people do; they've got '''Jack'''. There is something fascinating about the name Jack. Where does it come from? What does it mean? What kind of feeling does the name invoke in the common individual?

It seems Hollywood has a pool of [[NamesTheSame stock names]] they draw from, and for one reason or another, Jack is the name most often drawn. It's short, easy to remember, easy to yell. The short-A and sharp consonant sounds carry well over long distances when you're angry or in trouble.

And you know what? [[TropesAreNotBad That's just fine]].

What was once a nickname for John has blossomed into a given name for badasses, psychopaths, and BigDamnHeroes alike. The name Jack is the name you run to like a bear to honey, but could very easily be the name [[NamesToRunAwayFromReallyFast you run from]] like a bat out of hell. It's this versatility that makes the name kind of like a [[PunnyName jack-of-all-trades]] with many writers and authors seemingly declaring it as the perfect name to give to any character for anything and everything in any type of story, ever since the days of [[MotherGoose nursery rhymes]] like Jack & Jill and Jack and The Beanstalk, making it OlderThanPrint. It also has the connotation of good luck, as in the Jacks of Spades, Clubs, Hearts and Diamonds.

English-language {{Fairy Tale}}s often feature Jack as the hero, as long as he is a commoner. (PrinceCharming, if he is named, tends to get the full John.) This is paralleled in many other European languages, such as the German Hans, the Scottish Highlands Ian, or the Russian Prince Ivan.

Jack is the name of legends. And only legendary characters may have it. Compare GoAskAlice. Not to be confused with what CandleJack does to people who sa

This trope also has absolutely no relation to the last round of most ''You Don't Know Jack'' games.
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!!Examples:

[[foldercontrol]]

[[folder:Anime and Manga]]
* Jack Atlas, the "King of Riding Duel" in ''{{Yu-Gi-Oh 5Ds}}''
* ''MahouSenseiNegima'' gave us Jack Rakan in the Manga. [[http://img43.onemanga.com/mangas/00000020/00000200/06.jpg He does this.]]
** [[http://www.mangafox.com/page/manga/read/71/mahou_sensei_negima/chapter.73442/page.13/ That's not the half of it.]]
** Put it this way, in a series best defined as "a more perverted DragonBallZ", has yet to lose a straight fight. The BigBad himself had to cheat, and resort to [[RealityWarper altering reality so that Jack was having a tea party with him]] to avoid getting punched into oblivion.
* 'Jack' is also the name of the main character from the very obscure manga ''Shanghai Youma Kikai''.
* The manga ''Jack Frost'' comes to mind as well.
* ''BlackJack'', though it's not his real name.
[[/folder]]

[[folder:ComicBooks]]
* [[{{Batman}} The Joker]]'s real name is sometimes given as "Jack Napier" -- most likely a pun on "jackanape". Including in the [[Film/{{Batman}} first Burton film]], where he's played by JackNicholson...
* [[TheCreeper Jack Ryder]]
* Jack Knight, the lead character of ''{{Starman}}''. The mythic resonance of the name comes up now and then during the series; at one point, Jack's father, Ted, monologues to himself that he always knew that Jack was destined to be the hero in the family: that's why he named him "Jack".
* Jack Giant from ''Wildguard: Casting Call'', though his name is really {{JustForPun}}.
[[/folder]]

[[folder:Film]]
* ''Captain'' Jack Sparrow in ''PiratesOfTheCaribbean''
** And, of course, Jack The Undead Monkey.
* Jack Gruber in ''DieHard''. What's that, you say his name was Hans? Well, not in the German version...
* Jack Skellington in ''TheNightmareBeforeChristmas''
** Which makes two sets of Jack S. names in two of Disney's most successful modern films.
*** And both join Sora's team in ''KingdomHearts II''.
* Jack Slater in ''LastActionHero''
* Jack Putter, the everyman character in ''{{Innerspace}}''.
* Jack Dawson of ''{{Titanic}}''.
** He really existed. But was probably illiterate, and shovelled coal all day.
*** That there really was a "J. Dawson" who died when the Titanic sank is just a coincidence. Cameron didn't learn about him until after the movie came out.
* Jonathan "Jack" O'Neil(l) of ''{{Stargate}}'' and ''{{Stargate SG-1}}''.
* Jack-Jack Parr of ''TheIncredibles''. Yes he's a baby[[spoiler: , but one which can shapeshift, levitate, is superstrong, telekinetic, and has EyeBeams. [[ComboPlatterPowers Among other things]]]].
* Jack Driscoll from ''KingKong''
* The 2007 film ''WalkHard'' starred both Jack Black and Jack White (as Paul [=McCartney=] and Elvis Presley, respectively).
* The unnamed narrator of ''FightClub'' is commonly referred to as Jack (because of the "I am Jack's..." dialog).
* The titular character of the RobinWilliams movie ''Jack''.
** He also played Jack Dundee in ''The Best of Times'' and Jack Moniker in ''Club Paradise''. Not that anyone remembers those films...
* Jack the Forest Boy in ''{{Legend}}'', played by a very young TomCruise.
* Who can forget Jack Burton from ''BigTroubleinLittleChina''?
* [[GeneralRipper General Jack D. Ripper]], commander of Burpleson Air Force Base in DrStrangelove.
* Jack Carter from ''GetCarter''.
* Jack Twist from ''BrokebackMountain''. Played by a Jake (Gyllenhaal).
* Jack Banning, [[spoiler: Peter Pan]]'s son in ''{{Hook}}''.
* Jack Nicholson has played at least two characters named Jack ("TheShining", "Batman"). Lot of Jacks there between the actor and the characters.
[[/folder]]

[[folder:Literature]]
* The various Jacks of nursery rhymes and fairy tales such as: Jack and Jill, Jack and the Beanstalk, Jack-Be-Nimble, Little Jack Horner, Jack Spratt, Jack Frost etc.
** The comic book ''{{Fables}}'' proposes that all these Jacks (except Jack Spratt and Jack Ketch) are actually one very clever con man and trickster, who is a standout from the ensemble cast of the book. He eventually got his own spinoff series, ''Jack of Fables''.
** Jack Spratt in the Jasper Fforde's ''Nursery Crimes'' series also appears to be Jack of Jack and the beanstalk, Jack the giant-killer ("He was only 6'5'', hardly a giant") and several other fairy tale Jacks.
***Mostly obviously Jack Spratt: "Jack Spratt could eat no fat, his wife could eat no lean. And so betwixt the two of them, they licked the platter clean." In DI Spratt's backstory in the "Nursery Crimes" series, this unhealthy diet led to her death.
** Yet another work to propose the preponderance of heroic Jacks is no coincidence is Charles de Lint's ''Jack the Giant-Killer'' (collected as part one of ''Jack of Kinrowan''), in which the name is actually a title for heroic mortals connected to Faerie-kind.
** The most likely explanation for the multitude of fictional heroes named Jack in fairy tales and folklore is that Jack was another word for 'fool' in medieval and Renaissance England. Several of the classic English fairy tales involve a foolish hero (foolish enough to, say, sell his cow for a handful of 'magic' beans) bumbling his way to success through wit or luck. The foolish connotation of the word Jack is where we get the name of the playing card (reflecting the King, Queen and Fool of the royal court).
***The Jack character is very popular in Appalachian culture, where he is shown as clever and something of a rogue, but mostly kindhearted. His various adventures are known as "Jack Tales", including "Jack and the Bean Tree".
** Another explanation is that Jack is just a fill in name, Jack could be anybody, the average Joe so to speak. Fairytales from other countries often had their own "Jacks" such as the German Hans. The prologue to ''Don't Look Back, Jack!'', a book of Scottish folktales collected by travelling storyteller Duncan Williamson, calls the folktale Jack an "everyman" character.
* Captain "Lucky" Jack Aubrey, of the {{Aubrey-Maturin}} series (''Master and Commander'' in the movie.)
* Dr. Jack Ryan, a main character in ''TheHuntForRedOctober'', and most of the fictional novels written by TomClancy.
* Jack Merridew who represents savagery in ''LordOfTheFlies''.
* Jaqen H'ghar of ''ASongOfIceAndFire''
* The Man Jack, the villain from ''The Graveyard Book'' by NeilGaiman. Later turns out that [[spoiler:there's a whole ''guild'' of men named Jack, though their purpose is never really explained.]]
* Jack Flash/Jack Carter is a multidimensional constant in Hal Duncan's ''The Book of All Hours''. It's implied that all the other crazy Jacks in fiction and history are echoes or alternate reality versions of him.
* Jack Torrance from ''TheShining''. Played in TheFilmOfTheBook by... Jack Nicholson.
* Captain Jack West jnr. from ''Seven Ancient Wonders'' by MatthewReilly.
* Jack Crawford, Will Graham's highly competent partner from ''RedDragon''.
* "Half-Cocked" Jack Shaftoe, King of the Vagabonds, [[IHaveManyNames L'Emmerdeur, Ali Zaybak]], [[OverlyLongName Sword of Divine Fire]], of NealStephenson's ''TheBaroqueCycle''.
* [[{{Outlander}} Black Jack Randall]]. Would be somewhat badass, if he wasn't a [[CompleteMonster crazy]] [[DepravedBisexual rapist]].
* Captain Jack Havock from Philip Reeve's ''Larklight'' trilogy
* Jack Pumpkinhead from ''The Marvelous Land of Oz'' and other [[TheWonderfulWizardOfOz Oz books]].
[[/folder]]

[[folder:LiveActionTV]]
* Jack [=McPhee=] of ''DawsonsCreek''. In the season 3 finale his sister even refers to him by the trope name.
* Captain Jack Harkness of ''DoctorWho'' and ''{{Torchwood}}''
** Jack Harkness took the name of the original Jack Harkness, so it's highly likely that his real name isn't Jack.
** Don't forget ''The Adventures of Jack Harkaway'' from ''The Mind Robber''.
* Captain "Lucky" Jack Aubrey, of the {{Aubrey-Maturin}} series (''Master and Commander'' in the movie.)
* Jack Donaghy of ''[[{{ptitleolsdue4jfzga}} 30 Rock]]''
** Also Jack Rudolph on [[DuelingShows Studio 60]]. NBC legal would only let Sorkin/Fey use the name "Jack" for the evil network suit character.
* Jack Bauer of ''[[TwentyFour 24]]''
* Jack Shephard of ''{{Lost}}''
** Also the name of the serial killer in ''Frequency''.
* Jonathan "Jack" O'Neil(l) of ''{{Stargate}}'' and ''{{Stargate SG-1}}''.
* Jack [=McCoy=] of ''LawAndOrder: Classic Original Recipe''
* Jack Stiles of ''Jack Of All Trades''. Not a long-lived show, but come on, it's Bruce Campbell!
* When [[SabrinaTheTeenageWitch Sabrina Spellman]] turns herself into a boy she goes by the name Jack Sprattski.
* Jack Landors, Red Ranger from ''PowerRangersSPD''.
* Jack Cox, in ''{{Scrubs}}''. He may be a small child, but he is certainly the son of a BadAss.
* Djaq in ''Series/RobinHood,'' technically pronounced "Jark"; usually known as "Jack" in English. A woman, who took her brother's name on becoming a SweetPollyOliver, but lives up to the name's reputation by being a total {{Badass}}.
* Captain Jack, the Martian insurgent [[spoiler:and host to a parasitic Shadow servitor]] in the ''{{Babylon 5}}'' fourth season episode "Racing Mars".
* Sheriff Jack Carter from ''{{Eureka}}''
* Daddy Badass of ''{{Alias}}'', Jack Bristow. It's worth noting that his given name is actually 'Jonathan'.
* Jack Malloy from ''UnhappilyEverAfter''.
* Jack Malone in ''WithoutATrace''
* Jack of All Trades, the main villain on ''{{Profiler}}''
* Jack Large, one of the seven most evil men in the land, from ''BlackAdder''
* Jack Rimmer, the headmaster of ''WaterlooRoad''.
* Jack Gibson, in "SeaChange".
* Prince Jack Benjamin of ''{{Kings}}''. His given name? [[YouShouldKnowThisAlready Jonathan]].
[[/folder]]

[[folder:Music]]
* Jumpin' Jack Flash, the titular character of the Rolling Stones song.
** Referenced in Don McLean's "American Pie": "Jack be nimble, Jack be quick, Jack Flash sat on a candlestick"
* Captain Jack, the titular character of the Billy Joel song. Comes from a slang term for heroin.
* Captain Jack was a Eurodance duo composed of musicians Franky Dee and Sunny, until Dee's death. You may recall them from one of the DanceDanceRevolution setlists.
** The actual song is a catchy remix of a military cadence by the same name.
* The tar-boy in "Click Goes the Shears" is called Jack.
[[/folder]]

[[folder:ProfessionalWrestling]]
* [[{{WWE}} Jack Swagger]]. Also known as the [[{{Eagleland}} All-American]] [[DepartmentOfRedundancyDepartment American]].
* Black Jack Mulligan.
[[/folder]]

[[folder:RolePlayingGames]]
* Bobby '''Jack'''s and Jack O'Connor from ''SurvivalOfTheFittest''
* Incredibly common, both in the flavor text and in many games, in White Wolf's ChangelingTheLost. Understandable, as it's a game of modern-day faerie tales.
[[/folder]]

[[folder:Theater]]
* Mr. Jack Worthing of ''TheImportanceOfBeingEarnest''. The play being Oscar Wilde, his LoveInterest goes on about how [[SubvertedTrope Jack is a vile name that "produces no [musical] vibrations" whatsoever, and how the only man she could marry is one named Ernest]] -- good thing he's [[IdentityImpersonator pretending to have that very name]]. [[spoiler:The ending reveals he doesn't even have to pretend -- his real name is Ernest John Moncrieff.]]
[[/folder]]

[[folder:VideoGames]]
* In ''MetalGearSolid'', Raiden's real name is Jack (and commits sacrilege by calling it a "boring" name!)
** To make matters worse, [[{{Titanic}} his girlfriend is named Rose.]]
** Big Boss on the other hand... Hell, he's got an {{Eyepatch of Power}}, and not only saves the world from a secret war (twice) he also starts his own secret war (twice). He's mostly just named that to service a joke reference to [=MGS2=] if you say it's your favorite MGS game at the beginning of [=MGS3=]. He also says his name is John, but as mentioned before, Jack and John are basically the same name.
* [[XtremeKoolLetterz Jak]] of ''JakAndDaxter''
* ''HarvestMoon'': the fanname for the original male protagonist is Jack. His actual [[CanonNamo default name]] is "Pete", but [[{{Discontinuity}} no one]] ever calls him that.
* ''KingdomHearts'' uses two Disney Characters with this name, Jack Skellington from ''ANightmareBeforeChristmas'' and Jack Sparrow from ''PiratesOfTheCaribbean'', as world-specific party-members. To avoid problems with the game's character-status system, the later is called "Sparrow" in the game's Pause-*menu.
** Not to mention Jaq the mouse, originally from Cinderella, who appears in Birth By Sleep.
* Jack [[spoiler:Ryan]] of ''{{BioShock}}'', but it's very easy to miss the fact that he [[HeroicMime even has a name]].
* Jack Levin, pilot of the Astro Robin from ''{{F-Zero}} X''.
* Jack Russell, the main character of ''RadiataStories''.
** It should be noted, Jack Russell is likely [[MeaningfulName so named because he is incredibly bouncy, happy, and well, terrier-like]].
* Jack Van Burace/Vambrace, one of the leads in ''[[WildArms1 Wild ARMs]]''.
* Jack Cayman from ''MadWorld''. His Right arm is robotic and has a chainsaw attached.
* Jack Corvus from ''MegaManStarForce''
* ''ResidentEvil 4'' has Jack Krauser, who is pretty much the definition of BadAss.
* The BigBad in ''{{Fable}}'' is named Jack of Blades
* Jack Mower, TheHero of ''{{Nox}}''.
* Guess what the killer Russian robots from the ''{{Tekken}}'' series are named. Hint: it's not Ivan. And they DO attack.
* Would Jazz Jackrabbit count?
* ''You Don't Know Jack!'' seems to invoke this, even though no-one there's named Jack.
** Yes there is- The bald guy was nicknamed "Jack" by fans, and the UK and German versions have hosts named Jack (Jack Cake and Quizmaster Jack, respectively).
* Captain John Price from ''CallOfDuty 4: ModernWarfare''.
[[/folder]]

[[folder:WebComics]]
* Jack Snipe, [[spoiler: the Foolamancer]] from {{Erfworld}}
* Jack, the reaper from ''{{Jack}}''. Within his universe, however, he is a [[OneMarioLimit subversion]].
* Jack Schiff, resident CloudCuckooLander from ''[[http://www.tru-lifeadventures.com TRU-Life Adventures]]''
[[/folder]]

[[folder:WesternAnimation]]
* [[RuleOfThree Captain Jack]], the alligator, from ''TheSimpsons''
* ''SamuraiJack'', in which "Jack" is the titular character's alias, rather than his true name.
** He adopts it after a few hoodlums refer to him as Jack as a sort-of placeholder name (they don't know his real one, after all), and he assumes it's some kind of title.
* Jack Spicer of ''XiaolinShowdown''
* CandleJack, a villain in ''{{Freakazoid}}'' who would kidnap anyone who said his name. He was only in two episodes, but spawned a big [[MemeticMutation Internet me]]
* ''{{Transformers}}'': Even MechanicalLifeforms from distant worlds aren't exempt. Wheeljack is the most obvious example, but there's also Skyjack, Jackpot, Jackknife, and, because Japan has different naming conventions for Transformers, a few that are just called Jack.
* [[DannyPhantom Jack Fenton]]
* DarkwingDuck counted in his rogue's gallery the evil toymaker Quackerjack.
[[/folder]]

[[folder:RealLife]]
* Eerie RealLife example: JackTheRipper, a sinister SerialKiller from Victorian-era London whose true identity was never found. This mystique has actually caused him to be mentioned in and become an actual character in many works of fiction.
* [[http://en.wikipedia.org/wiki/Spring_Heeled_Jack Spring Heeled Jack]], in Victorian-era London.
** The killer dubbed Springheel Jack in the StephenKing short story Strawberry Spring (found in Night Shift).
** As well as the main character of the Philip Pullman novella of the same name. The Batman of Victorian London, 'e is!
* [[RealLife Jack Nicholson.]] Just...Jack Nicholson.
** Who has, as mentioned above, played at least two fictional Jacks.
* Jack Black is Jack in ''HeatVisionAndJack''. In it, he performs a Jack Attack, which involves swinging around a pole. Why isn't this higher on the list?
** He once hosted the MTV Movie Awards, and got to introduce punk duo The White Stripes, which began with him saying: "My name's Jack Black - his name's Jack White..."
** For an even bigger stretch, look no further than ''TropicThunder'', where Jack's co-star Ben Stiller plays Tugg Speedman, an actor who'd just been in the role of... Simple Jack.
* A real life example who also fits the list below - Calico Jack, a famous 18th century pirate, who made the Jolly Roger flag an icon of piracy and also had both Anne Bonny and Mary Read in his crew. His real name was John Rackham.
* One nickname for Royal Navy sailors is "Jack Tars".
* RealLife example: CSLewis was known as "Jack" to his friends. Given that the "C.S." stood for [[EmbarrassingFirstName Clive]] [[EmbarrassingMiddleName Staples]], one can't really blame him.
* Why hasn't anyone mentioned JackThompson yet?
** [[{{Discontinuity}} Huh?]] [[{{Unperson}} Who's that?]]
* Jack Russell Terriers, tenacious little dogs that take on pit bulls and [[{{Wishbone}} teach kids that reading is fun]].
* JackChick
* When Tiger Woods wins another major golf tournament, whose record is he trying to break? Jack Nicklaus, the "Golden Bear". (No, they are not PettingZooPeople.)
* Jackpot!
[[/folder]]

As mentioned earlier, Jack used to be a nickname for John. As such, John has been a name of choice to give heroic characters too, probably because it's a very common, Anglo-Saxon name that makes the hero an "everyman". It should be noted that most Johns in fiction go by their surnames, compared to the Jacks, who prefer their given names.

[[folder:ComicBooks]]
* John Constantine of ''{{Hellblazer}}''
* Folk hero John Henry
** John Henry Irons, the DCComics and ''SupermanTheAnimatedSeries'' hero better known as Steel is named after him.
* John Hartigan of ''SinCity''.
* The ''{{Fables}}'' spin-off ''Jack of Fables'' has Wicked John who looks exactly like Jack with black hair instead of blond. It's eventually revealed that [[spoiler: Jack is a copy of Wicked John, the original trickster. John was the one that really did many of the things Jack is credited with like climbing the beanstalk and killing the giants, because most people have forgotten him and remember Jack.]]
[[/folder]]

[[folder:FanFic]]
* [[FanFic/HalfLifeFullLifeConsequences John Freeman]], who was [[HalfLife Gordon Freeman]]'s brother.
** [[Fanfic/DoomRepercussionsOfEvil John Stalvern]] waited...
[[/folder]]

[[folder:Film]]
* John [=McClane=] of ''DieHard''
* John Connor of ''{{Terminator}}''
* John Kruger of ''{{Eraser}}''
* John Kimble of ''KindergartenCop''
* John Matrix of ''Commando''
* John Rambo of ''{{Rambo}}''
* Cleric John Preston of ''{{Equilibrium}}''
* John Lee of ''TheReplacementKillers''
* John Spartan, the ''{{Demolition Man}}'', who most certainly doesn't go by Jack, and gets no nicknaming at all in the future. In fact, most characters address him with both first and last name.
[[/folder]]

[[folder:Literature]]
* John Clark from the TomClancy novels, codename "Snake" (mentioned in WithoutRemorse). Also, the Jack Ryan mentioned above has the birth name John Patrick Ryan.
* Jonathan Harker of ''{{Dracula}}'' fame.
* Jon Snow (pronounced like "John") of ''ASongOfIceAndFire''
* John [[spoiler:Yossarian]] of ''Catch-22'', only revealed at the end in a throwaway line and easy to miss.
[[/folder]]

[[folder:LiveActionTV]]
* John Sheppard, ''StargateAtlantis''. He's usually called "Colonel Sheppard", although he's technically a Lieutenant Colonel (it's the US military system that also calls everyone with a star "General").
** Not everyone with a star is called General, some are called Admirals
* As well as Jack Harkness, ''{{Torchwood}}'' has Captain John Hart. Jack's EvilCounterpart (and [[NewOldFlame ex-lover]]).
* John Sheridan of ''[[BabylonFive Babylon 5]]''.
* John Locke of ''{{LOST}}'' is almost always referred to by his last name.
* Johnathan Archer from ''StarTrek''
* John Crichton from ''{{Farscape}}''
** Whose father is a Jack.
* "Mr. Big" of ''{{Sex And The City}}'' is named John, which we only learn during the last shot of the series finale.
* John Casey of ''{{Chuck}}''
[[/folder]]

[[folder:Radio]]
* John Avery "Whit" Whittaker from ''AdventuresInOdyssey''. During his [[DiedOnABus Middle East expedition]], his role is temporarily filled by a new character named... Jack Allen.
[[/folder]]

[[folder: Role Playing Games]]
* ''SurvivalOfTheFittest'' again: John Rizzolo.
[[/folder]]

[[folder:VideoGames]]
* Naked Snake/Big Boss of ''MetalGearSolid'' is named John, but goes by the nickname of "Jack."
**Hell, there is a four man {{Jack Attack}} in MGS4 with the aforementioned "Jack" (Raiden) along with three Johns. Johnny "Akiba" Sasaki, Johnathon, and [[spoiler:Raiden's son, "Little John"]].
* Master Chief of ''{{Halo}}'' is called JOHN-117
* In the ''{{Castlevania}}'' games, Quincy Morris' son and grandson are both named John and Jonathan.
* John Shepard from ''MassEffect''
* John Raimi from ''{{Geist}}''
* Fans tend to call the player character in HarvestMoon "Jack", even after his name was officially revealed to be Pete in Puzzle de Harvest Moon.
[[/folder]]

[[folder:WesternAnimation]]
* The JusticeLeague has a John Smith (Red Tornado), John Stewart (GreenLantern) and John Jones (MartianManhunter, real name J'onn J'onzz, pronounced more like "Jean" than "John). The Flash does some LampshadeHanging in one episode ("I'll go call the Johns").
[[/folder]]

[[folder:RealLife]]
* American President JohnFKennedy (was commonly referred to as "Jack")
** And his son 'John-John'
** A ton of politicians have been named John.
* The Apostle John
** The other John, the Baptist one
* Admiral John Arbuthnot Fisher, better known as "Jackie" Fisher.
* Watch any NASCAR race, and you'll hear a lot about jack-men. (They jack the cars. No, [[GrandTheftAuto not jack]], lift.)
* A toilet.
* Any unidentified male in criminal investigations, particularly dead victims, are called "John Doe."
[[/folder]]

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