Like the Doctor, the renegade Time Lord known as the Master used many aliases. However, while the Doctor used false names on a fairly ad hoc basis to avoid awkward questions, the Master usually adopted them in order to further whatever scheme they were embarked upon at the time.

"The Master" was itself an alias. He chose this name, as the First Doctor did his, while attending the Academy. (TV: The Sound of Drums; AUDIO: The Destination Wars)

"Renegade" incarnation Edit

Alias When used Story Etymology
The Inventorwhen posing as a hero on the planet DestinationThe Destination Wars

"UNIT enemy" incarnation Edit

Alias When used Story Etymology
KoscheiAn old name the Master used while at Time Lord Academy, he resumed using it again sometime after he left GallifreyDivided Loyalties
The Dark Path
In Russian folklore, Koschei hides his soul in an obscure location under many layers of protection so that he can never die.
Professor Carl Thascalosto give Jamie McCrimmon the Necronomicon, and to gain access to facilities of the Newton InstituteThe Nameless City
The Time Monster
Greek for master, pointed out by Jo Grant
Colonel Mastersto infiltrate Rex Farrel's plastics companyTerror of the AutonsHis typical alias with an s on the end
Emil Kellerassumed identity of the creator of the Keller MachineThe Mind of EvilEmil is derived from the Latin word aemulus, meaning rival, and Keller is derived from Old English cwellere, meaning executioner
Martin Jurgenswhile posing as an AdjudicatorColony in Space

Anagram of Master Gunnjir (gunnjir is the spear of Odin, head of the Norse pantheon)

Victor Magisterto insinuate himself socially into the Devil's End community as a vicar, and later the name used when being charged for his crimesThe Dæmons
Who Killed Kennedy
Latin for master
ConranThe Man in the Ion Mask
Prisoner MHarvest of TimeThe first letter of his typical alias
Jack Harristo use a stolen Ford Cortina to reach his TARDISThe Eight DoctorsName of car's original owner whom the Master had killed
Brigadier Lethbridge-Stewartto trick Sergeant Benton, and later the Third Doctor and Jo GrantThe Time Monster
The Heralds of Destruction
Freywhilst in Sweden, 141The Spear of DestinyOld Norse for master
General Mayhew The Heralds of Destruction
Inspector LeMaitreto infiltrate a village fete by pretending to be a police inspector from Scotland YardLast of the GadereneFrench for the master
Dook DominiIn the 1930sThe Duke of DominoesNamed after The Duke of Dominoes, a trump card in an old Wallarian game of chance which beat all other suits.
Senator Szef The Seismologist's StoryPolish for boss, chief
McMaster Doctor Who Fights Masterplan "Q"
Geoffrey Thynneto infiltrate Kenstone HallThe Touch of the Nurazh
Aloysius Fischerto infiltrate a UNIT Christmas partyUNIT Christmas Parties: Christmas TruceDr. Aloysius Fischer was the person the Master assumed the identity of, though he assures the Doctor that Fischer is still alive. Aloysius is originally derived from the German name Chlodovech, meaning famous in war.
The Raffolite Ambassador The Same Face
Duke Dominusto impersonate a 1930s Chicago gangsterThe Duke of Dominoes Dominus from the Latin for lord or master of the house
Rupert MastersClaiming to represent the "Masters Corporation" Night Flight to Nowhere
The Doctor Anything You Can Do
The Commissioner of Sirius IV Frontier in Space
Estrowhile posing as an adviser to Lord Haldoran in an effort to procure a Dalek matter transmuterLegacy of the DaleksEsperanto for master
Professor Dominar Doorway to Hell Spanish for dominate

Degenerated body Edit

Alias When used Story Etymology
Dr. Damien ScottWhilst working for the Dominus Institute in the body of a future incarnation.Vampire of the MindIn French Damien means to subdue or tame, symbolizing the Master's position in the Dominus Institute.
General MalgroveWhilst leading a faction of the Gorlan Empire.The Two MastersThe Gorlan word for master
Van HoutenIn the 1890sMauriceNamed after chocolates common in the time period.
Mr. DominusWhen visiting the Red Tavern in the 1890sMasterpiece Dominus from the Latin for lord or master of the house
Mwalimuwhile hiding beneath Colonel Spindleton's manor house in 1979Trail of the White WormSwahili for master in the sense of teacher
Interplanetary Police Inspector Efendi while on Secus The Evil OneTurkish for "Master"

"Tremas" incarnation Edit

Alias When used Story Etymology
Tremasto deceive Nyssa on Logopolis after taking over her father's bodyLogopolisA coincidental anagram of "Master"
The Portreeveto trap the Fifth Doctor in CastrovalvaCastrovalva
Kalidused to take control of the Xeraphin gestaltTime-FlightKalid derives from the Indian Kalidasa meaning servant of Kali, an Indian goddess of time and change and usually depicted as being dark and violent
Sir Gilles Estramto avert the signing of the Magna Carta in 1215.The King's DemonsEstram is a simple anagram, coincidentally the name of a knight whom he impersonates.
Mr. Tase The Velvet DarkAn anagram of Master
Merlin The Creation of Camelot
The Sheriffto gain access to the regenerative fountain near Eternity, California.A Town Called Eternity
Professor Masterman The Time Savers
Branko Gospodarto access the TITAN Array in order to destroy the ChronovoresThe Quantum ArchangelSerbo-Croatian and Slovenian for master
Keith PotterAssumed identity of possessed body as part of a plan to dominate the dimensional nexus.The End of the Line
Alan Campbell Prisoners of Time
Dr. Howard ChithrosStop the Pigeon
DominusCrossing the Rubicon
Major Kreerused when allied with the Tzun in 1950s America.First FrontierContinued to use alias after his regeneration

"Tzun" incarnation Edit

Alias When used Story Etymology
Count Marius Castillo Housewarming

"John Smith" incarnation Edit

Alias When used Story Etymology
Mr. SetaUsed aboard the starship GalleryDust BreedingAnagram of master
Dr. John SmithUsed while amnesiac on an unnamed colony worldMaster

While body-jumping Edit

Alias When used Story Etymology
Bruce Occasionally reverted to impersonation of a San Franciscan paramedic named Bruce after he had taken over Bruce's body Doctor Who
Daniel In Bruce's body trapped in the Vortex The Lifeboat and the Deathboat
Richard Possessed human Forgotten
Don MaestroWhilst trapped on Earth in the 20th century.MastermindItalian for master in the sense of teacher
Alien Artefact Alpha 1While being kept in the Vault.Mastermind
The Protector While on the planet Parrak Planet of Dust

"Bald" incarnation Edit

Alias When used Story Etymology
Dr. Harcourt De'athTo practice eye surgery on many patients, in order to literally "have eyes everywhere" Time's Horizon, Eyes of the MasterBar the apostrophe, De'ath is spelt the same way as "Death".
Kappa ChiDesignation as CIA agent.The Death of Hope
Master-BuilderWhen creating the Dalek Time Controller's new empire.The Monster of Montmartre
The DoctorWhilst masquerading as a future incarnation of the Doctor.Dominion
Michael MastersonWhile living in Hexford in the body of a past incarnation.And You Will Obey Me

"War" incarnation Edit

Alias When used Story Etymology
Cyber-MasterWhilst masquerading as a Cyberman, superior to the Cyber-Controller.Master of Worlds
TS MereathIn 19th century US.The Coney Island ChameleonAnagram of "The Master"
CrazlusMasquerading as Crazlus to Narvin
SorvadWhile pretending to be the late Davros' uncle on Skaro.The Master's Dalek PlanDavros spelled backwards. The Master claims this is a "family tradition".
The DoctorWhilst masquerading as the Doctor on Gardezza.Beneath the Viscoid
Dr. KellerWhilst on Arcking.The Good MasterReusing alias from The Mind of Evil
Professor YanaChameleon arch identityUtopiaHad no known meaning of its own, but the Face of Boe made up an acronym, "You Are Not Alone".

"Harold Saxon" incarnation Edit

Alias When used Story Etymology
Harold Saxonused to become Prime Minister of the United KingdomThe Sound of DrumsMister Saxon was a coincidental anagram of Master No Six; Harold is a derivative of Old English Hereweald meaning Master of the Armies
Mr. Razorused while on board a Mondasian colony shipThis World Enough and TimeThe Old English word for knife is seax, which is what the name Saxon originated from. His name, then, is ostensibly "Mr. Saxon" - the name given the first time the Saxon incarnation is mentioned in The Christmas Invasion.
Alpha 7designation for the Mondasian Cybermen created on a colony ship for Operation ExodusAlit in Underland

"Missy" incarnation Edit

Alias When used Story Etymology
Mrs. BraithwaiteAfter marrying Bobo BraithwaiteDismemberment
MissyNew name adopted shortly after regenerating into female formDeep Breath, Dark WaterShort for "Mistress", feminine form of "Master".
Mobile Intelligence Systems InterfaceRuse allowing close contact with and delaying recognition by the DoctorDark WaterBackcronym from "Missy"
Miss MagisterWhen posing as a teacherYes, MissyLatin for master
Beatrice FoxcroftWhen meeting with the Monk, who was disguised as Henry VIIIDivorced, Beheaded, RegeneratedBeatrice means "bringer of joy or blessings", as one would expect a queen to
Doctor WhoWhen practicing being good aboard a Mondasian colony shipWorld Enough and Time

"Spy" incarnation Edit

Alias When used Story Etymology
OAssumed identity of an MI6 member who he had shrunk with the Tissue Compression Eliminator.SpyfallWhile posing as "O", the Master claimed he was named as such as a joke; whenever "O" met with C, C would exclaim "Oh, God!" After revealing himself, however, he explained that he chose the name for satisfaction, anticipating correctly that the Thirteenth Doctor would exclaim "Oh..." as he dropped the act.

Behind the scenes Edit

Footnotes Edit

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