As of patch 6.1, it seems that WoW character names are no longer protected, meaning anyone can register character names of some NPCs or items that were previously locked, as well as offensive names, which also seem not to be locked anymore. Of course, if you register offensive names it will lead to a ban or a free forced rename with GM intervention, so that’s not really a good idea.

Thanks to 4096 @ ownedcore.com, here is a huge list of NamesReserved.dbc, out of which most previously locked names are now free to use:

AUX
Aedthna
Aksherom
Amorph
Anachronos
Anubarak
Anveena
Arygos
Astalor
Aszahel
Azuregos
Belikaria
Binladen
Broxigar
Buchmor
CON
Caelestrasz
Casereth
Cerunya
Cthun
D[iíìïî]+[oóòöô]s
Daitagea
Dalrend
Daothann
Darkhan
Dentarg
Desconocido
Dimernesti
Diskeskel
Dooldon
Drekthar
Drieyi
Eitrigg
Emeriss
Eranikus
Essyerackh
Focustarget
Frostmourne
Garithos
Grumetix
Hakennar
Hakkar
Halduron
Hamuul
Harmonniek
I.*montoya
Inconnu
Isbaan
Isban
Isbann
Ishenrei
Izdrum
Jammalan
Johrro
Juancarlos
Kalecgos
Kazzak
Kelvalak
Khamlen
Khamlenn
Khamlyn
Kinelde
Kurdran
Lethon
Lorthemar
Macarsul
Mekkanivelle
Mekkatorque
Merithra
Methiur
Mexique
Mistraey
Mogor
Muradin
NUL
N[e]farian
Nazgrel
Nefarian
Nielasaran
Nobundo
Olltur
Oltur
Olturr
Onyxia
PRN
Peratix
Portvaillant
Poufsouffle
Princesaleticia
Principefelipe
Radeknaar
Rajaxx
Ranengmor
Ranengmor[rt] Rastakhan
Rexxar
Rey
Rommath
Smoech
Smoechh
Smooech
Sombrelance
Sombrelances
Taerar
Tanrakat
Temereth
Thaurissan
Thedrien
Themeret
Themereth
Tinhin
Tinhinn
Tinnhin
Toniki
Tonikii
Torl[ae]him
Torlhaim
Tybress
Unbekannt
Vaelastrasz
Valstann
Varianwrynn
Vashj
Vereesa
Yaleey
Yaley
Yalley
Ysondre
Zarborough
Zolphea
Zulokko[ck]alimdor[ck]risto[e]claireur[e]cosse[e]cuyer[e]p[e]iste[e]quateur[e]thiopie[e]tranger[e]vocateur[op]wn[ei][gj] [op]wnage[op]wned[sc]heik[st]hehulk
a.*jolie
aadicus
aagalias
aaliyah
abba
abbix
abgrin
abjurateur
abjurer
abomination
acdc
achrana
ackhoes
activex
acura
adair
adham
adiccus
adicus
adicuus
adidas
adiicus
adjurateur
admiral
adolf
adrohn
adviser
adware
aegwynn
aerosmith
aesta
aeternaventum
afghanistan
afi
afk
africa
afrique
afro
agamaggan
agelaius
agent
ageofempires
aggramar
agnostic
aguilar
ailedemort
aishii
ajolin
akeisha
akili
akumaaru
alabama
alain
alakir
alandilling
alaska
alato
albania
albanie
albuquerque
alexstrasza
alextrabek
alf
alg[e]rie
algeria
algiers
allah
allara
allemagne
allemand
alleria
allines
allymcbeal
alotharn
alpacino
alqaeda
alsimmons
altanan
altavista
altim
alyssamilano
am[e]rique
amanthul
amazon
ambryseus
amd
amenhotep
america
americanidol
amiral
ammodo
amsterdam
anakin
anchorage
andril
anex
angleterre
angola
ankara
ankhsunamun
annex
annexx
annikah
annikai
annikas
annot
antigua
antonidas
apexia
apius
apocalypse
apollocreed
aporian
aquilei
arab
arabe
arabie
arabies[a]oudite
arafat
aragon
aragorn
arashunee
arathi
arbys
arcanist
arcaniste
archana
archanis
archbishop
archdruid
archer
archev[e]que
archidruide
archimonde
ardasa
argentdawn
argentina
argentine
aria
arizona
arkansas
arm[e]nie
arme
armenia
armetris
armorsmith
armsman
armurier
aroth
arothan
arthas
aruba
arugal
arwen
arxios
arythan
asap
ascii
asd
asdf
ashenvale
asia
asie
aspen
assassin
asseriffic
asstastic
astiri
astonmartin
atalan
atari
ath[e]e
ath[e]nes
atheist
athens
atlanta
atlantic
atlantique
atm
atre[i]des
atreides
atro
atticusfinch
aubedargent
audi
augumac
aujah
austinpowers
australia
australie
austria
austrivage
autobot
automap
autoroute
avani
avas
aviande
avrillavigne
axantheon
axeman
ayatollah
aznar
azshara
azureflame
b.*spears
babar
bacaburn
baghdad
bahrain
baiedubutin
balnazzar
bammik
bangkok
bangladesh
bantom
baptist
baptiste
barbade
barbados
barbedebronze
bard
barde
baron
baroness
baronne
barrens
bartex
bartsimpson
basf
batman
battlenet
bb[qs] beastieboy
beastrider
beelzebub
beetlejuice
bekyn
belarus
belz[e]buth
belzun
benaffleck
benstiller
berceaudelhiver
beritun
berlin
berserker
bestbuy
bethl[e][e]m
bethlehem
beverlyhills
bi[e]lorussie
bible
bigbird
bigboi
bilbo
bilbon
billclinton
billgates
billpullman
billygunn
billyidol
billythekid
bilze
binlad[aei]n
bionicman
bios
biritus
blackhand
blackpanther
blackrock
blacksmith
blade
bladefist
bladerunner
blancheneige
blesk
blevran
bliz
blizzard
blizztech
block
bloodhoof
bloodscalp
bmw
bobafett
boctoon
bogbog
bogdor
bogger
bohlok
bohvoc
bohvok
bolivia
bolivie
bond
bonechewer
bonjovi
bootybay
borithus
boromir
bosnia
bosnie
botswana
boucanier
bouddah
bowman
boygeorge
br[e]sil
bradpitt
braeden
brakton
brann
branwen
brazil
brb
breanna
brettfavre
bricoleur
brigadier
brightwater
britannique
british
bronson
bronzebeard
broud
broxren
broxrenn
broxrin
brucebanner
brucelee
brucewayne
bruglaz
brusier
bryanadams
buccaneer
buda
buddah
buddha
budweiser
bugsbunny
bugsysiegel
bulgaria
bulgarie
bullwinkle
burgerking
bush
bustarhymes
bustarhymez
butcher
butthead
bwhittle
c[e]narien
c[e]narion
c[e]narius
cachi
cadavre
cadrex
caenon
calianny
calidorn
california
californie
caligula
callist[aeo] calobos
cambodge
cambodia
camerondiaz
canada
canaliste
canuck
capetown
capitaine
caporal
captain
captainhook
caracus
carpenter
carrick
casablanca
cash
casio
catholic
catholique
catwoman
caydiem
cedarick
cenarion
cenarius
centurion
cercleterrestre
cesario
chaman
champion
changeforme
channeler
chanteguerre
charliebrown
charon
charpentier
chasseur
chef
chefboyardee
chefdeguerre
chenji
chernobyl
chevalier
chevrolet
chewbacca
chicago
chief
chieftain
chimkral
china
chine
chinese
chinois
chizo
chocobo
chogall
chovolone
chowdown
chr[e]tien
chrisbenoit
chrisisaak
chrisreeves
chrisrock
christ
christian
chrono
chrysler
chuckycheese
chunli
ciralle
cisco
citunde
clarkkent
clinton
cloudstrife
cmanley
cobais
cocacola
cocoboldine
cocolo
coke
coldplay
collossus
colombia
colombie
colonel
colorado
commandant
commander
commer[c]ante?
compaq
comte
conan
confucius
conjurer
connecticut
conner
conseiller
cook
copenhagen
cor[e][e] cor[e][e]dusud
corosis
corporal
corpse
corsair
corsaire
corvette
corvich
costarica
councilor
count
couronnedeglace
courselune
coursevent
cprompt
cr[e]teducorbeau
cravell
crayola
criptur
croatia
croatie
crois[e] croisade[e]carlate
crommus
cromuss
cruelladevil
crusader
cthulhu
cthulu
cuba
cuisinier
cycronis
cykronis
d.*anthony
d.*wareham
d[e]fenseur
d[e]mocrate
d[e]moniste
dabiri
daelorr
daewoo
daffyduck
daghorn
daimonata
dalailama
dalenni
dalga
dallenhaal
dalreth
dalyce
dalyse
dame
danemark
danfal
danna
danu
dark iron
darkshore
darkspear
darkvador
darrion
darsis
darthsidious
darthvader
data
davidbowie
davycrockett
deadwind
deathlord
deathwing
decepticon
deejay
defender
defleppard
delaware
dell
delltaco
democrat
denalge
denmark
derralo
desmal
destrus
deszo
detheroc
deuillegivre
deuillevent
deverawn
devin
devineresse
dewd
dexlan
diablo
diabloii
diablotin
dickgrayson
dicktracy
didier
dido
dietcoke
dietpepsi
dieu
digimon
dimpleen
directx
dirkar
dirtyharry
disneyland
dividark
divilight
diviner
dmx
docholliday
dococtopus
docteur
doctor
dogma
donaldduck
doncorleone
donkeykong
donniedarko
donquichotte
donquixote
dood
dooku
doomhammer
doval
dracomalfoy
dracula
draemoore
dragonfire
dragonmaw
dragonsoul
drake
dralnoth
dranzor
draregh
dray
drdre
dresselen
dri[sz]*t
droktahn
drpepper
drseuss
druid
druide
dubbert
dubias
duc
duchess
duchesse
duke
dukenukem
dulcinea
dumbo
dunnary
durotan
dvd
dwarf
dyn
dynead
e.*avila
earth
earthen ring
easter
easterbunny
ebay
ebonus
ecuador
edrenok
eedo
egypt
egypte
einstein
eldenea
elemer
eleus
elfedelanuit
elisarre
elizadushku
elmerfudd
elminster
elrond
eltonjohn
elune
elvis
elvispresley
elwoodblues
elyse
email
emberlynn
eminem
emire
empereur
emperor
encarr
endrel
england
ennemipublic
enoyls
enron
enseigne
ensign
eolande
eonar
eowyn
epifanio
epson
ericbischoff
erreur
error
esclave
espagne
esquire
esylvia
ethiopia
eunji
evanescence
everquest
evincar
evoker
evolan
exxon
eypion
eyve
f.*kruger
f.*pearce
faelex
fai
fandral
fanta
fantasia
fantassin
faora
faramir
farrakhan
fascism
fascisme
fatboyslim
feathermoon
fedex
feiredith
felgrynn
felnaro
fenrae
feralas
ferenevel
ferson
fiani
fidelcastro
fieryice
fiftycent
fighter
fiji
finabr
finland
finlande
firestone
fischer
fizzlebits
fl[e]au
flightshadow
florida
floride
flugent
focus
foo
foofighters
fordring
foreigner
forestier
forgefer
forgeron
forrestgump
forteramure
fossoyeuse
foudreguerre
foudrepique
foxybrown
fr[e]re
fraizer
fran[c]ais
france
frankenstein
franksinatra
freddurst
french
frodo
frodon
frogger
frostwolf
fruitopia
fryds
fyi
g.*bush
g[e]n[e]ral
g[e]n[e]ve
g[uw]enhwy[fv]ar
galadriel
gamada
gambit
gameboy
gamecube
gamemaster
gamous
gandalf
gandraor
gard
garde
gardien
gargamel
gariema
garona
gatorade
general
geneva
georgebush
georgia
georgie
german
germany
gettysburg
ghamos
ghandi
gheist
ghey
ghostryder
ghran
gimli
glarvax
glore
gm
gnome
gnomeregan
goaden
gobelin
goblin
god
godzilla
golganneth
gollum
gomorrah
gomorrhe
goofy
google
gorido
gr[e]ce
graccus
gradient
grakthro
grandadmiral
grandamiral
gratefuldead
grayhem
greece
greengoblin
greenland
greenlantern
gremlin
greog
greyhem
greymane
grimtotem
griset[e]te
gro[e]nland
grom
grunt
guam
guard
guardian
guardsman
guatemala
gucci
guerrero
guerrier
guide
guiness
guldan
gungadin
gungdil
gunsnroses
gustaven
gypte
h.*potter
h[e]raut
h[e]ritier
h[e]ros
h[o]te
hacilus
hagendazs
haha
hahmoor
haiti
hak[sz]or
hakil
halleberry
haltron
hamas
handofjunco
hansgruber
hansolo
hanszimmer
hanthor
harleyquinn
harrypotter
hasbro
hati
havok
hawa
hawaii
hax
haxor
healer
heineken
heinzketchup
heir
helenhunt
hell
hellboy
hellokitty
hellrot
hellscream
herald
hero
hershey
herzog
herzug
hibus
hilaryduff
hindou
hindu
hitachi
hitler
hobgoblin
hogwarts
hollywood
holyghost
holyspirit
homersimpson
honda
honduras
hongkong
hongrie
honolulu
hoover
horslaloi
horus
host
hotmail
houdini
howardstern
html
http
hufflepuff
huggybear
hughgrant
hulk
humain
human
hungary
hunter
hurlevent
hurlorage
hurzog
hussein
hyberia
hyjal
hyundai
ibartus
ibizsha
ibm
icecrown
iceland
iceman
ichibodcrane
idaho
iggypop
ikarum
ikea
ikili
ikvash
illidan
illinois
illuminas
illusionist
illusioniste
ilyia
imhotep
imiri
imp
imp[e]ratrice
inconnue?
inde
india
indiana
indoflaven
indon[e]sie
indonesia
infirmi[e]re?
ingonia
inquisiteur
inquisitor
inspectorgadget
intel
internet
inventeur
inventor
invocateur
invoker
iowa
iran
iraq
ireland
irlande
ironforge
ironmaiden
ironman
irontusk
islam
islamabad
islande
isra[e]l
israel
ista[mn]boul
istanbul
italie
italy
izthed
j.*cash
j.*chow
j.*depp
j.*goad
j.*guthrie
j[e]hovah
j[e]rusalem
j[iy]had
jabbathehutt
jabilo
jackbauer
jackdaniels
jackiechan
jackripper
jade
jaimin
jali
jama[i]que
jamaica
jamesbond
jamiroquai
jangofett
janisarie
japan
japon
jarden
jarjar
jarule
jayz
jehovah
jeiko
jemoro
jenn
jerrylawler
jerusalem
jessica
jesus
jethrotull
jetli
jew
jfk
jig.*puff
jonis
joo
jordan
jordanie
jorem
jorrin
joueur
joueuse
ju+das
judgedredd
judgejudy
juggernaut
juif
junco
junix
jurassicpark
jyhad
k.*bryant
k.*cobain
k.*kline
k.*marx
k[e]nya
kaboul
kabul
kaelthas
kaenon
kahlei
kaken
kalgan
kaljynn
kalljyn
kalynna
kamishu
kandoga
kansas
kanyewest
kardaor
karisgard
karliss
katricia
kawasaki
kazakhstan
keebler
kegel
keke
kelecgos
kellog
kelrt
kelstonebull
kelthuzad
kennedy
kentucky
kenya
keple
kepler
kern
kerry
kevral
kewl
keynalla
kezreh
khadgar
khan
kharst
khazgoroth
khazmodan
khrogul
khryden
kidrock
kiljaeden
kilrogg
kimiru
kin
kindan
king
kinleu
kioly
kirintor
kirk
kishori
kitsunie
kmart
knight
knoxville
kodak
kokua
kolim
kool
koran
korea
koredale
korialstrasz
korias
korl
korn
kowa[i]t
kozzar
kracker
krasus
krebz
kredou
krimorus
krishna
kurtangle
kuwait
kye
kyiv
kylie
kyrgyzstan
kyros
l.*croft
l.*lohan
l.*luth[eo]r
l[e]gion
l[e]gionnaire
lady
ladyliberty
lamborghini
lameardente
lanalan[eg] lando
lanick
laos
lapaz
lapindep[a]ques
larete
larette
larrybird
lasvegas
lathoren
latvia
lauracroft
lazarwulf
leader
lebanon
ledzeppelin
leech
leedak
leet
legion
legionnare
lego
legolas
lekgin
lenci
lepape
lepsa
lequron
lestat
leth
lettonie
leukin
levain
lexcil
lib[e]ria
liban
liberia
libya
libye
lichking
lieutenant
lightbringer
ligwill
lilioso
lilkim
limey
limpbizkit
lincoln
linderstolk
linkinpark
linksys
lisbon
lisbonne
litchking
lithuania
lithuanie
llane
llcoolj
lmao
lmfao
loislane
lokanar
lol
london
londres
loneranger
lord
lordaeron
loremaster
loren
lothar
louisiana
louisiane
louisville
loupdegivre
lucasarts
lucienne
lucif[e]r
lucifer
luciuss
lunedargent
lunnara
lusius
lutrimal
luxembourg
lyanaa
m.*bricker
m.*foley
m.*hein
m.*jane
m.*mouse
m.*tyson
m[a]cheurdos
m[e]phisto
m[e]re
m[ou]ham?.d
ma[i]tre
ma[i]tredejeu
ma[i]tredestraditions
ma[i]tresse
mac[e]donie
macedonia
macgyver
madagascar
madonna
madrid
maemaleth
mage
magica
magicjohnson
magiscoldeye
magneto
magtheridon
mahoma
maidmarian
maiev
maindargent
mainnoire
majica
majical
major
malaysia
malaysie
malcil
malco?mx
malcomx
male
maleki
maleterres?
malfurion
malganis
malglas
malkidorn
malorne
malpheon
malthar
malygos
manadoran
mandorath
manju
mannoroth
mar[e]chal
marchande?
mardam
marin
marine
marlboro
maroc
mars
marshal
marteaududestin
marteauxhardis
maryland
marypoppins
master
mastermind
matalonu
maxfactor
mazda
mcdonalds
mcnuggets
mcquade
mdecin
medic
medivh
medwin
megade?th
megaman
megatron
meika
melbourne
melchor
mendarrin
mephist
mercenaire
mercenary
merlin
messiah
messie
metallica
methodman
metroid
metzen
mexicain
mexican
mexico
michelob
michigan
microsoft
mightymouse
miitan
mikezan
mikezin
mikezun
mikkel
minnesota
minsk
minstrith
mirasorvino
mirrith
mississippi
missouri
misspiggy
mister
mistress
mitsubishi
mo[i]se
mobile
mobydick
monaco
mongolia
mongolie
monlya
montana
montenegro
monture
montypython
monvil
moondragon
moonrunner
moozilla
morhaime
morocco
mortrin
mortvivant
moscou
moscow
moses
mosryn
motdepasse
motega
mother
motleycr
motorola
mottfen
mount
mourdok
mouseover
mozambique
mozilla
mr
mufasa
murginor
murmevent
murnethel
muslim
mussolini
musulman
mychel
myla
myrria
myrthus
n[e]cromancien
n[e]croprince
n[e]o
nabisco
nachovidal
nachtfalke
nain
nalost
name
nanjing
napol[e]on
napoleon
narnia
nascar
nashville
nassimar
natedogg
naxarus
nazareth
nazjatar
nebu
necromancer
neekeri
nefarian
neltharion
nema
nemo
nennji
neo
neorah
nepal
neptulon
nerzhul
nessanna
netherlands
neverland
newb
newcastle
newdelhi
newjersey
newmexico
neworleans
newyork
newzealand
nextel
niagara
nicaragua
nichilum
niger
nigeria
nightcrawler
nightelf
nightsiren
nightstalker
nilvaden
nimue
nintendo
nirios
nirvana
nissan
nitesh
nixon
nochthitus
nofx
nokia
nom
none
noob?
noobsaibot
nordrassil
norfendre
norgannon
normanbates
northkorea
northrend
norvge
norway
notoriousbig
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nozdormu
npc
nsync
nurse
nuugharm
nvidia
o.*bloom
obiwan
odee
odeee
odisse
officer
officier
ogath
ogre
ohio
oklahoma
ombrelune
omg
ominias
oodee
oomiclomp
oprah
optimus
optimusprime
optiren
oraya
orc
orcish
orcka
ordinn
oregon
orgrim
orgrimmar
orneval
orque
orycea
osama
othello
otramisk
ouganda
outkast
outlaw
ouzbekistan
overmind
own.
ownz
p.*bunyan
p.*hogan
p.*parker
p.*sams
p[a]ques
p[e]rou
pachnein
pacific
pacifique
pacman
pagnus
pakistan
paladin
palestine
panama
pantera
pape
papebeno[i]t
papejeanpaul
paraguay
pardo
parqa
party
partypet
password
pat.*bunny
pathfinder
pax
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paysan
pdiddy
pearce
pearljam
peasant
pennelune
pennsylvania
pennsylvanie
pennywise
pentium
pepsi
perenolde
perth
peru
peshawar
pet
peterpan
petras
pettarget
phart
phe[ae]r
philadelphia
philadelphie
philippines
phinneus
phish
phodax
phomiae
photox
phreak
piglet
pikachu
pikeman
pillsbury
pilot
pilote
pinkfloyd
pinkpanther
pinsargent[e]s
pippin
piquier
pixar
pizzahut
plaguelands
player
playstation
pnj
pochacco
poisonivy
pokemon
poland
pologne
pope
popebenedict
popejohnpaul
popeye
porkypig
portauprince
porteurdelumi[e]re
portugal
potomac
poudlard
pourfendeur
powerpoint
pr[e]tre
pr[e]tresse
pract
praenom
prague
praqu
president
prestor
priest
priestess
primus
prince
princess
princesse
private
professorx
projesk
projeska
projesko
proudmoore
psycho
publicenemy
puertorico
puffdaddy
pumpkinking
punisher
purgator.
purgatory
pussinboots
pyaray
qiradon
quayrue
queen
quelthalas
quemaar
quemar
quemarr
quicksilver
quigonjinn
quizzon
qulen
r.*balboa
r.*gunst
r.*hood
r.*james
r.*reagan
r.*runner
r[e]publicain
r[o]deur
rachana
raclin
radeon
radiohead
ragnarok
ragnaros
raid
raidpet
rainman
rajio
rakdar
ralgaris
rambo
ramones
ranger
ransiel
rasio
rastor
ratzinger
ravencrest
ravenholdt
razi
razio
raznic
recaa
recrue
redcel
redcell
reddcell
redman
redskull
reiishi
reine
renaki
republican
rey
reylin
reymysterio
rhiovanna
rhodeisland
rhonin
rhoswen
ricflair
riknorak
ringostar
riodejaneiro
riogrande
rivka
rkelly
ro
[kx]+ors
robocop
robzombie
rochenoire
rochenoires
rockybalboa
rodneyking
rofl
roflm?ao
rogerrabbit
rogue
roi
roiliche
rollsroyce
romania
romassen
rome
romme
roper
rothman
roths
roumanie
rubeushagrid
ruffian
ruffryder
rumsey
rundmc
runeforza
runetotem
rupaul
russia
russie
rwanda
rydalen
ryone
rythor
ryu
ryyst
s.*austin
s.*claus
s.*king
s[e]oul
sabotdesang
sabretooth
saddam
sailor
sainterre
salvatore
samara
samoa
sams
samsung
samueladams
samuelmorse
samuro
sandiego
sanjose
santa
santana
sarajevo
sargeras
saroumane?
sarto
saruman
satan
saudiarabia
sc.*doo
scalde
scalprouge
scarface
scarlet crusade
schtroumpf
schwartz
scissorhands
scooby
scotland
scourge
scout
seabiscuit
seattle
sebulba
seefat
sega
seigneur
seigneurdeguerre
semajo
senemut
senjin
senrus
sentinel
sentinelle
seoul
sephemon
sephiroth
seratris
serbia
serbie
sergeant
sergent
serhkel
server
serveur
seto
sgtslaughter
shadowdragon
shadowfaerie
shadowmoon
shaiyenn
shakespe[ae]r
shaman
shane
shangha[i] shanghai
shangrila
shaofle
shaogwi
shaoji
shaomogwi
shapeek
shapshifter
shawshank
sheik
shenrai
sherlock
shiara
shieldbearer
shinto
shipwreck
shiva
shoia
shrek
sicily
sidhren
sidhrien
silver hand
silvermoon
silverpine
silversurfer
simba
simpson
sinbad
singapore
singapoure?
sir
siriphe
siriusblack
sirmixalot
sisqo
skald
skittles
skywalker
slave
slayer
slipknot
slov[e]nie
slovakia
slovaquie
slovenia
smirnoff
smokeybear
smurf
snapple
sneezy
snoopdogg
snoopy
snowhawk
snowwhite
sodom
soigneur
solanas
solarin
soldat
soldier
solidsnake
somalia
somalie
sombrefer
sony
soothsayer
soracian
sorci[e]re?
sorthis
soudan
soundgarden
southkorea
spain
sparda
sparrowstorm
spawn
spiderman
spock
spongebob
squire
squirtle
srilanka
staghelm
stalin
staline
stalker
starbuck
starbucks
starfox
starlancer
starscream
starwars
stawl
steveo
stfu
stnick
stockholm
stoopid
storm
stormpike
stormrage
stormreaver
stormwind
stpaul
stpetersbourg
stpetersburg
strangelove
strider
stryzux
stuartlittle
su[e]de
sublime
subzero
sudafed
sudan
sugarray
suh
suijini
suisse
summoner
supermario
support
suriname
suzuki
swaziland
sweden
switzerland
swordsman
sycronis
syeron
syfur
sylvanas
synd
syria
syrie
system
t.*cruise
t.*hanks
t.*hawk
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tacobell
tagarsh
taikeo
tailleur
tailor
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taiwan
tanaris
tannue
tanos
tanzania
tanzanie
taoki
tarareid
tarci
taredan
target
targettarget
targoz
tarides
tarzan
tauren
tayten
tchernobyl
tech
tedbundy
tehran
tektherion
telaviv
teldrassil
telicesen
tellari
telvash
templar
templier
tennessee
terazil
terenas
tergor
terre
terrorblade
terryschiavo
tetragamaton
texas
tha[i]lande
thailand
thanatos
the
thehulk
theoden
thepope
therazane
therock
thesius
thief
thirdreich
tholac
thrall
threndwral
thunderbird
thunderlord
thundgot
ticall
tichondrius
tigerwoods
tigger
tigole
tillithan
tinkerbell
tinkerer
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tokyo
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tommylee
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toothfairy
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totemsinistre
toucansam
toyota
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tradesman
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traquenuit
traqueur
triael
trinidad
trinity
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tripoli
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troisi[e]mereich
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trollbane
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trolvar
tron
tsanik
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tulzzark
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twain
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uber
uganda
ukraine
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ulis
ulmarr
ulruhk
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undead
undermine
unknown
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unzii
ups
ursin
ursol
uruguay
utah
uther
uzbekistan
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versace
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visual
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warcraft
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warlord
warmachine
warrior
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weezer
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whittle
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wildhammer
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willywonka
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wilthurn
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winnie.*pooh
winterspring
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wizard
wizlow
wolverine
wonderwoman
woodstock
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wootage
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wutangclan
wyattearp
wynam
wyoming
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xanann
xannan
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xavius
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xendros
xerox
xman
xontasis
xorxa
xpac
xylon
xzibit
yahoo
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yaoi
ye
yellowcard
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ylitz
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yonkers
yoplait
yoshi
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ysera
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za[i]re
zabniu
zaglia
zaire
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zalusk
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zambie
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zechthal
zedlar
zekeron
zelda
zeugmarak
zexes
zexxus
zien
ziffloc
zimbabwe
ziven
zoidberg
zolax
zoloft
zoru
zothrok
zugahl
zugdauruk
zujuama
zuljin
zurich
zztop

wow character names no longer protected

Source: OwnedCore.com

If your account already has the 11 available spots filled and you don’t want to delete any character just yet, you can register a trial account and add it on the same account and store your WoW character names on the trial account until you decide which one you’d like to use for your main.

All in all, as long as you’re not planning on registering an offensive name, you should be fine keeping any other character you’ll register, so go login right now and get yourself some awesome WoW character names, because you never know when you’ll reroll or plan on renaming your toon!