But only if they never abbreviate it to "Alex"... or for that matter "Xander"...or worst of all, "Sandy".note Though after 2012, "Sandy"may count now... Named after Alexander the Great, the Macedonian king who conquered Greece, Asia Minor, Egypt, and Persia. And was starting on India. Bonus points for the somewhat more obscure Iskandar, which was the name the Persians knew him by; see the Other Wiki.
Fullmetal Alchemist: Alex Louis Armstrong. He can get away with shortening it to "Alex" partly because we hardly ever hear his full name, and partly because he's already such a silly yet badass character that the name doesn't do much to take away from his badassery.
Alexander Anderson from Hellsing, Alucard's most dangerous adversary.
Alexander Xanatos. Confirmed by Word of God to be named after the Macedonian king, reflecting his parents' ambitions for him.
Thailog, a clone of Goliath with Xanatos' values, also chooses "Alexander" as an alias for the same reasons. (Xanatos taught him way too well...)
It is probably not a mere coincidence that Rodrigo Borgia, when he succeeded to the Papacy in 1492, from all possible options chose Alexander as his Papal name, thus becoming Pope Alexander VI.
Attila the Hun has pretty much turned the name into an adjective meaning 'barbarian' or 'vicious conqueror'. However, "Attila" actually means (in Gothic) "little father". German variants of the name are Etzel and (yes!) Edsel. Also spelled Atilla in Turkey.
Captain Marvel villain IBAC, who gains his initials and villainy from Ivan, Borgia, Attila and Caligula.
Attila Csihar, a Hungarian black metal vocalist who has collaborated with Mayhem and Sunn O))).
But only if they never abbreviate it to "Gus", or, worse yet, "Gussie". Or, for that matter, "Auggie", but that's pretty uncommon. Named after Gaius Octavius Augustus, nephew of Julius Caesar and first emperor of Rome. (And not even the worst one.) (In fact, most would probably agree that he was the BEST one.)
Both of the titles 'kaiser' and 'tsar'/czar' are derived from 'Caesar'. Of course, the kaisers and tsars were notable lines of conquerors in their own rights. In some cases, 'kaiser' can be a respectable title for someone, like it was for Ryu in Yu Gi Oh Zexal. Named after Gaius Julius Caesar, who conquered and unified Italy, Gaul, and the Iberian peninsula towards the end of the Roman Republic.
Cesare Borgia, son of the aforementioned Pope Alexander. Not as bad as his enemies suggested, but still a bad dude. That Cesare Borgia was well aware of the symbolic potential of his name is documented by the self-chosen motto which he had inscribed on his sword: Aut Caesar aut nihil—"either (a) Caesar or nothing".
The name's fame comes from Cyrus The Great, founder of the Achaemenid Persian Empire. However, this name has become less popular (both for real people and fictional characters) after a certain teenage pop star (not to mention her father) ruined it for everyone.
The first name of several Roman emperors including Gaius Octavian Augustus, one the greatest emperors. This is because it was the Roman "praenomina" which, by the time of the late Roman republic, had been narrowed down to less than ten common names. The "cognomen" (the second name usually) was much more commonly used by the time of the Caesars.
In Codex Alera, the entire House of Gaius, adopted (Isana and Aquitainius Attis) and particularly by blood (all those by blood are automatically a Personof Mass Destruction). Particular examples Gaius Sextus who set the benchmark for Heroic Sacrifice and an incredibly Badass Grandpa, Gaius Septimus, one of the greatest swordsmen ever to live and almost as powerful as his father without inheriting his furies, and Gaius Octavian (later known as Gaius Tavarus Magnus, i.e. Lord Wolverine the Great) who is the main character, grew up without furies and combines the raw power of the House of Gaius with a mind that looks at everything sideways.
Played with on Gunsmoke. When Chester's brother Magnus rolls into town, Chester is embarrassed because he considers him to be an uncivilized, half-wild backwoodsman. To Chester's surprise, it turns out that despite Magnus's goofy demeanor, he's The Ace who is good at practically anything he sets his hand to.
The original gets the double whammy of also having Khan used as part of his nickname. He's thatBadass). His real name Temujin is less intimidating, but it pops up occasionally. Even though Temujin roughly translates to "Strong-As-Iron" in Mongolian, and "Supreme Earth Man" in Chinese.
Girl Genius: Gilgamesh Wulfenbach. He wants to be reasonable, really he does. But people usually don't let him. Those people tend to regret it... But not always for very long. He will call down the lightning. He will disappear before your eyes. There's nothing he could not do, had he cause... And now? Now he has one.
The book Elephant Run features a huge elephant named Hannibal, who's pretty nasty if you don't know how to handle him. He was probably given that name because the Carthaginians were famous for their war elephants.
An Amazon queen in Greek Mythology, though as one of the few "tough" feminine names, a girl with this name has at least an even chance of being good. "Polly" is generally too quaint-sounding to be tough or evil, though.
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Sailor Moon: Makoto's DiC dub name was Lita. Fitting, considering she's the most amazonian of the Inner Soldiers.
Julian the Apostate was a Roman Emperor who rejected Christianity in favor of paganism, for which posterity branded him a traitor. Julian, the semi-legendary Count of Ceuta, joined the Muslims and let them cross over into Spain; and the probably fictional Saint Julian the Hospitaller murdered his parents while they were staying at his house—although he was tricked into it, and got his name for using his wealth to build shelters for the poor afterwards. A Julian is seldom as psychotic as some of the names on this list, but he should be taken very seriously. Not to mention the fact that it is the adjective form for describing some of the early Roman emperors (though they are more commonly referred to as Julio-Claudian).
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Latin for "(the) Great" or "Big" (and root of "Magnificent"). A rare personal name in Roman antiquity, it made another career after the newly-christianized, warlike royals of medieval Scandinavia adopted it as a first name by shortening the name of their idol Charlemagne ("Carolus Magnus" or "Karlamagnus" to them).note The Latin meaning of the name was mostly lost to them. However, as it happens, 'magn' also means 'power' or 'might' in Old Norse. Magni ('strong one'/'strength') is the name of a son of the God Thor. Due to this lofty origin, it was exclusive to members of the high aristocracy, usually royals, in the Middle Ages. Today it is a fairly common (and therefore, harmless) first name in many Nordic countries. In fiction, often points to a Scandinavian, vaguely Viking-y, aristocratic background.
Magneto from X-Men, alias Erik Magnus Lehnsherr. The way Magneto spells his Erik with a k has an additional effect of making him look Nordic. Also, "Lehnsherr" is German for 'liege' or feudal lord.
A slight variation: Gladiator's hero, Maximus Decimus Meridius. Due to the quirks of Roman naming (and also because of the idiosyncratic way his name was rendered), most viewers don't realize that Maximus is not actually his given name, but a title. In English, his name comes out as Maximus the Great, Conqueror of the South. Certainly a name to run away from if you're in the arena with the fellow, or just happen to have assassinated his Emperor.
Using the normal Roman nomenclature, Maximus would be his given name, Decimus his family name, and Meridius perhaps a nickname given after a notable victory. But since everyone in the movie calls him Maximus - and almost no one called a Roman by his given name except his closest family - perhaps a more accurate rendering of the name would be Decimus Meridius Maximus?
In Codex Alera, Gaius Tavarus Magnus (Lord Wolverine the Great), formerly Gaius Octavian, formerly Rufus Scipio, formerly Tavi Ex Cursori, formerly Tavi Patronus Gaius, Tavi of Calderon, formerly Tavi of Bernardholt. Looks at everything sideways and is the epitome of Guile Hero, combined with a heavy dose of Crazy Awesome, every plan being Crazy Enough to work and is eventually a Personof Mass Destruction.
Magnus Greel, the villain of The Talons of Weng-Chiang, one of the most egregious war criminals in human history.
In the Sanctuary series Helen Magnus; dated, and had a daughter with Jack the Ripper who can teleport by the way, has a complicated relationship with Nikola Tesla who was a vampire, is in conflict with Dr. Jekylle and Mr. Hyde, used to hang out with James Watson and Nigel Griffin before they died of old age (she can live for ever, Tesla is a vampire and Druitt... well no word on what keeps him, or Adam alive), currently friends include Bigfoot and a werewolf and occasionally has to deal with a rampaging superabnormal like Big Bertha aka Kali.
Another Icelander: Magnus Magnusson, the late host of Quiz ShowMastermind. The mere sight of that iconic black chair could strike terror into the bowels of any would-be contestant.
Prominent conqueror kings from the Middle Ages who added taste to the name Magnus would be Charlemagne (Carolus Magnus), Magnus I "the Good" of Norway and Denmark, Magnus IV "The Caresser" of Sweden and Magnus III "Barelegs" of Norway.
As a Roman epithet, Magnus was most prominently connected with Alexander and Pompey. There is also Magnus Maximus, a 4th century usurper who toppled the Western Roman Empire in a disastrous civil war.
The demon lord Neron from The DCU. The numerological ties to "666" are pointed out.
Believe it or not, any use of the Number of the Beast might count, since it's speculated that the Book of Revelation is a disguised anti-Roman tract. When treated as Hebrew numbers, the letters of "Neron Kesar", the Greek version of Nero's name, add up to 666. This theory is further supported by the use of 616 as an alternate Number of the Beast in some early editions of the Bible. The letters in 'Nero Caesar" (the original Roman spelling of his name) add up to 616.
Nero, the greedy cliff troll from the Fablehaven series. Tying in with the name's meaning, he also has black scales.
In the H.I.V.E. Series, the principal of the titular Higher Institute of Villainous Education. He is the main villain of the series until it is revealed that he is, in fact, a good man, operating under the orders of Overlord to capture and train Otto.
After the infamous Soviet dictator. Fun fact: Stalin is itself already a Name To Run Away From Really Fast, as it is an almost direct translation into Russian of Stalin's original Georgian surname, Dzhugashvili. It means "Man of Steel".
Fran Stalinoskovichdavidovichski in Dodgeball who can knock out and possibly kill a man with one throw of a dodgeball.
The Katyusha multiple rocket launcher was nicknamed "Stalin's organ" by the Germans in World War II partly because the missile racks resembled a church organ, but also because of the terrible howling noise and destruction they caused.
The name of several of Rome's pre-Republic Etruscan kings, but especially associated with Tarquin the Proud, Rome's final king and a reputed tyrant, as well as his son, Sextus Tarquinus, known as a rapist.
Given its allusions to Roman history, this might be an inspiration for Tarkin in Star Wars, one of the Empire's top generals.
Note that "Vladimir" roughly translated as "ruler of (this) community", but due to language drift it translates to "ruler of the world" now. Note that in Russian these names are just everyday names, so they are not that scary.
Vlad Heterodyne, AKA Vlad the Blasphemous, from Girl Genius. Built the first Castle Heterodyne (a simple fortress, particularly compared to later incarnations, but effective and intimidating nonetheless) and invented the Jägerdraught, the drink that turns people into Jägerkin.
Vladimir Ilyich Ulyanov, better known as Lenin, Vlad the Impaler (aka Dracula), Vladimir Putin (particularly if you used to be part of the USSR). List wouldn't be complete without the guy who started the tradition: Vladimir the Great, Kievan prince who christened Rus.
Vladimiro Montesinos, head of Peru's intelligence service during President Fujimori. His parents actually named him after Lenin; ironic, considering he became famous for being the head of intelligence of a government that fought against a communist insurgence.
William the Conqueror (and William Wallace too) make William and variations on the name a usage of this trope.
Marvel's Bill Foster with alias like the Black Goliath, the fourth Goliath, and the second Giant-Man is definately someone to run away from really fast.
William Boldwood from Thomas Hardy's novel Far from the Maddening Crowd, set his sights on pursuing a conquest of a different sort than his name sake.
William Briden a character in H.P. Lovecraft's work, who actually survives his first encounter with Cthulhu and escapes from R'lyeh, although having seen an Eldritch Abomination and having Gone Mad From The Revelation he isn't exactly able to survive for the several weeks his ship spends at sea awaiting rescue.
He has almost the same name as one of history's more memorable badasses: the sole survivor of the Retreat From Kabul. (Well, sole survivor other than Flashman, that is.) This might be a coincidence, but given that Lovecraft was a fervent Anglophile and obsessed with history, it's quite possible that it intended as a Shout-Out.
William Ewart Gladstone from the Bartimaeus trilogy "was a very powerful nineteenth century British magician, who rose to become a Prime Minister. He led the Grand Army of the Empire on conquests that decimated countries and made them a part of the British empire" - The Other Wiki
Mr. William Bones, Esquire, better known as Billy Bones, from Treasure Island was the first mate of Captain Flint and not someone you wanted to piss off. Even Long John Silver was wary of confronting Billy directly.
William Wilson, from the short story of the same name. He's so bad that his conscience manifests as a Doppelgänger trying to stop him, whom he eventually murders. That's right, he killed his own conscience.
Mighty Morphin' Power Rangers: Billy Cranston. A highly intelligent, determined warrior (especially as the series progressed) who faced down countless monsters. Not somebody to mess with. Monster has an annoying special trick to make attacks not work? He'll find a way to neutralize it and join his team-mates in the ensuing beatdown.
Wilhelm (a German variant of William) was the name of two German kaisers, the second of whom ruled during World War One.
The original Xerxes did conquer half of the middle east, though he is most often remembered for his failed attempt at conquering Greece. Good to know: Xerxes' name also appears as Ahasuerus; both forms are just different transliterations of his Persian name Xayāra.
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Van Hohenheim's homeland from Fullmetal Alchemist. Not scary or threatening, but it sure sounds cool.
Also the name of Mozenrath's flying eel companion in Disney's Aladdin: The Series, but he's more of a Nuisance Connected to Someone to Run Away Really Fast From than anything. Still, they made the effort.