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During his travels in time and space, the Doctor employed many different aliases; sometimes only briefly and sometimes on an ongoing basis. Owning to his refusal to tell all but a few people his real name, he often had names bestowed upon him by others, often to his chagrin.
The mystery of the Doctor's real name
Ubiquity of the title
"The Doctor" was not, in fact, a name, but a title. His given name was not generally known (see below), and as such the very title "the Doctor" was an alias. It has been implied his given name was ceremoniously withdrawn and stricken by his Cousins, as punishment for a disgrace he visited upon his House. (NA: Lungbarrow) When asked about the Doctor's name, his companion Peri Brown once said she'd been told she couldn't pronounce it. (BBCR: Slipback) Even when he was twice put on trial by his own people, the Time Lords, he was only ever referred to during these events as "the Doctor" (DW: The War Games), although The Valeyard, who prosecuted the second trial (and who, himself, was a future manifestation of the Doctor), acknowledged that it was an alias. (DW: Trial of a Time Lord) However, as the Doctor chose that "name" as part of Gallifreyan custom (DW: The Sound of Drums), its use in an official capacity is not unexpected.
The Doctor was able to keep his true name hidden despite numerous "mind-probe" attempts, both voluntary (DW: The Girl in the Fireplace) and involuntary (DW: The Shakespeare Code).
Individuals who knew (or might know) his true name
The Master and the Doctor had known each other since their Prydon Academy days, and by one account even earlier (BFA: Master), but it is not known for certain whether he ever knew the Doctor's true name, although he was well aware that "the Doctor" was an alias. (DW: The Sound of Drums) Another classmate of the Doctor's, Drax, may have known his real name, but instead referred to the Doctor by the nickname "Thete", short for Theta Sigma. (DW: The Armageddon Factor; The Happiness Patrol)
Madame de Pompadour recognized it as an alias when she was briefly connected to the Doctor's mind (DW: The Girl in the Fireplace), stating "Doctor...Doctor who? It's more than just a secret, isn't it?". Whether or not Madame de Pompadour actually learned his name this way remains undisclosed. She was able to see into his mind and into his past, although it was established that if mind-reading was done in this way, memories could be closed off at will. That said, the Doctor was not aware that she was reading his mind at the time.
River Song, who when the Doctor first encountered her claimed to have known him at some point in his future, is one of the only individuals confirmed to know his true name. In order to win the Doctor's trust, and prove her "credentials", she was seen to whisper the name into his ear. The Doctor seemed particularly shocked at this, later saying to her "there is only one reason I would ever tell anyone my name, only one time I could."(DW: Forest of the Dead)
She whispered the Doctor's name for a duration of roughly two seconds, suggesting the name may only be a few syllables long (assuming she uttered a complete name). The significance of the Doctor's statement afterwards is open to a number of possible interpretations. As Steven Moffat made a point of mentioning the Doctor's name (and its secrecy), it is possible he will make some sort of a point of it in the upcoming Series 5. Indeed, he has stated in the past that he always felt the Doctor's name was never revealed only because it must have been some "terrible secret".
At least one other person, the Doctor's companion Samantha Jones, was also told his real name (EDA: Unnatural History, EDA: Vanderdeken's Children). Whether the Doctor's statement to River Song applies to her as well is unclear.
Attempts to discover his true name
The Carrionite Lilith, unable to discover the Doctor's true name even with the "witchcraft" used by her kind, remarked, "There is no name. Why would a man hide his title in such despair?" (DW: The Shakespeare Code) The psychically-gifted Evelina, who attempted to foretell the Doctor's future, remarked that his "true name" was in fact "hidden". (DW: The Fires of Pompeii)
Significance of the title
Far from being a random title, or one intended to inflate his credentials, the Doctor did, indeed, possess at least one doctorate (DW: The Armageddon Factor; The Mysterious Planet) On other occasions he described himself as a "Doctor of many things", or, indeed, "everything" (DW: Utopia). Exactly what his doctorate(s) were for remain a mystery, although on several occasions the Doctor stated he was not a medical doctor (although that didn't stop his tenth incarnation from sporting a stethoscope on occasion).
List of aliases
During his life, numerous names were either used by, or bestowed upon the Time Lord most widely known as the Doctor.
Major names and aliases
The Doctor
As noted above, The Doctor itself was an alias, despite it being the name by which the Time Lord was most widely known. As per Gallifreyan custom, he chose this alias himself (DW:The Sound of Drums). On at least one occasion, a Human knew this name without the Doctor even saying it out loud. (NA: Cat's Cradle: Warhead) His other aliases often included the title "Doctor". He implied to Peri that his given name also began with such a title (DW: The Trial of a Time Lord: The Mysterious Planet). Drax, a fellow Time Lord, indicated that the Doctor did indeed possess a doctorate (although in what is not indicated) (DW: The Armageddon Factor). According to one account, during his first incarnation, the Doctor adopted this name for the benefit of Human colonists on the planet Iwa at the same that his grand-daughter adopted the name "Susan". (TN: Frayed)
Theta Sigma
Theta Sigma (ΘΣ), informally "Thete", was a nickname used by the Doctor during his years at the Time Lord Academy on the planet Gallifrey. (DW: The Armageddon Factor, The Happiness Patrol, DWM: Flashback) The name might also have been a codename used by some aspects of Time Lord government to refer to the Doctor. (The Adventures of K-9 series)
- Note - in the Greek alphabet, Sigma (Σ) slightly resembles the letter W turned on its side, and the Greek letter Theta (Θ) slightly resembles the letter H inside the letter O.
John Smith
John Smith was the alias the Doctor often used on Earth and around Humans when a "standard" name was often required or demanded. It was usually preceded by the title "Doctor", though not always - for example, when he worked undercover as a teacher at a school and as a patient in a hospital. (DW: School Reunion, Smith and Jones) The earliest known use of the name occurred during his second incarnation, and it may have been devised by his companion at the time, Jamie McCrimmon (DW: The Wheel in Space). Later, he adopted it on a semi-regular basis during his third incarnation while exiled on Earth when he served as unpaid scientific advisor to UNIT. (DW: Spearhead from Space, et al)
As "John Smith" is considered a very generic name in some Earth cultures, the Doctor's use of the alias was occasionally treated with skepticism by others (DW: Midnight).
At one point in his life, the Doctor temporarily changed himself into a human who used the name John Smith. There are conflicting reports as to whether this occurred in his seventh incarnation (NA: Human Nature), or in his tenth (DW: Human Nature/The Family of Blood). Due to the uncertain canoncity of the New Adventures novels, it is more likely the latter.
Known uses of "John Smith"
- Given to him by Jamie and used aboard Space Station W3. (DW: The Wheel in Space)
- During his exile on Earth with UNIT, during which time he served as its scientific advisor (DW: Spearhead from Space, The Time Warrior)
- "JSMITH" was the Doctor's handle online. (PDA: Blue Box)
- A modification of this name, Johann Schmidt, was used by the Doctor while impersonating a Nazi Reichsinspektor. (NA: Timewyrm: Exodus)
- The French translation, Jean Forgeron, was used by the Doctor's fourth incarnation when met by French soldiers in the labyrinth underneath Paris. (DW: The Forgotten)
- Given to him serendipitously by Chang Lee on his hospital admittance forms after he was shot near the end of his seventh incarnation. (DW: Doctor Who: The TV Movie)
- Appeared as "Dr. John Smith" on a piece of psychic paper during a visit to 1941 (although he never actually used the alias on this occasion). (DW: The Empty Child)
- Used while working under cover as a science teacher at Deffry Vale High School. (DW: School Reunion)
- Used while posing as a patient at Royal Hope Hospital. (DW: Smith and Jones)
- Used while impersonating a health and safety officer during an investigation of Adipose Industries (DW:Partners in Crime)
- The Doctor attempted to use the alias aboard the Crusader 50 bus on the planet Midnight, but it was recognized as a false name and rejected by the panicking humans aboard. (DW: Midnight)
- Used when "reintroducing" himself to Donna Noble after he was forced to erase her memories of him. (DW: Journey's End)
- Used when encountering Jackson Lake, a man who due to time stamp exposure, believed himself to be an incarnation of the Doctor. (DW: The Next Doctor)
The Supremo
For a year, the Doctor used this alias as leader of the Alliance against the army of the evil renegade Time Lord Morbius. (PDA: Warmonger)
- For an unrelated use of the term, see the Supremo.
Merlin and Muldwych
This was, the Doctor believed, an alias used by a future and/or alternative Doctor residing in a magic-using parallel Earth. (DW: Battlefield) This was, apparently, a future incarnation of the Doctor who, at times, also used the name Muldwych. (NA: Happy Endings) (Another account, however, says that another renegade Time Lord used the alias of Merlin. (ST: One Fateful Knight) See Merlin and Muldwych.)
Minor aliases
First incarnation
Maximus Pettulian
While visiting the Roman Empire prior to the burning of Rome, the Doctor briefly impersonated a murdered lyre player named Maximus Pettulian in the court of Nero until his true identity was uncovered. (DW: The Romans)
Zeus
When the Greek warrior Achilles mistook the Doctor for Zeus posing as an old man, he went along with it, until the already unconvinced Agamemnon, spoiled the Doctor's ruse. (DW: The Myth Makers)
Doctor Caligari
Name used by the Doctor when he arrived in Tombstone, Arizona, impersonating a magician. (DW: The Gunfighters)
Second incarnation
Doctor von Wer
Doctor von Wer was an alias briefly adopted by the Doctor during his visit to Scotland in 1745. It is German for Doctor [of] Who translated into German. He also signed a note Doctor W around this time. (DW: The Highlanders)
Third incarnation
Quiquaequod
Miss Hawthorne referred to the Doctor as "the great wizard Quiquaequod" while attempting to bluff the villagers of Devil's End into releasing him. (DW: The Dæmons)
- "Qui", "quae" and "quod" were the masculine, feminine and neutral forms of "who" in Latin.
Fourth incarnation
?
The Doctor signed a document with a question mark prior to the the Sontaran invasion of Gallifrey. (DW: The Invasion of Time). Later, the Doctor's seventh incarnation signed a document the same way during a visit to London in 1963. (DW: Remembrance of the Daleks)
Sixth incarnation
Doktor of Tardis
Pseudonym used by the Doctor to move discreetly around an alternate version of the city of Rome. (MA: State of Change)
Tenth incarnation
Doctor James McCrimmon
The Doctor briefly took the name Dr. James McCrimmon while visiting Scotland in 1879; this was the name of one of his old companions. Later, however, he dropped the alias and was knighted by Queen Victoria as "Sir Doctor of TARDIS". (DW: Tooth and Claw)
Sir Doctor of TARDIS
Aside from being knighted under this name, the Doctor also attempted to use the title when he encountered William Shakespeare, via the psychic paper, but Shakespeare's mind could not be swayed by the paper.(DW:The Shakespeare Code)
Doctor Vile
The Doctor briefly masqueraded as the space pirate Doctor Vile in order to stop a war. (DW: The Infinite Quest)
Doctor McCoy
After a discussion with Donna Noble, in which she compared the sonic screwdriver with Star Trek's tricorder, the Doctor adopted the alias Dr. McCoy (after Dr. Leonard "Bones" McCoy, a Star Trek character) when dealing with a group of soldiers. (Donna called herself Captain Kirk, after James T. Kirk, the lead character of the Star Trek series.) The ruse fell apart when Donna was unable to maintain the pretense of being a captain. (NSA: Pest Control)
Spartacus
When visiting Pompeii in 79 A.D, The Doctor and Donna both used the Alias 'Spartacus'. Caecilius at first thought they were a married couple, then later thought they were Brother and sister, with The Doctor and Donna simeltaneously replying "really?" (DW:The Fires of Pompeii)
Doctor Noble
When the Doctor and Donna Noble travelled to the Ood Sphere, he used the Alias Dr. Noble this led to people confusing the Doctor and Donna for a married couple. (DW: Planet of the Ood)
The Time Lord Victorious
Deciding to alter history by rescuing Adelaide Brooke and two of her comrades from Bowie Base One on Mars in 2059, the Doctor became arrogant and egotistical, declaring that the laws of the Time Lords to prevent altering history no longer applied because he was the last, so he had total authority over time itself. He called himself "the Time Lord Victorious" and dismissively referred to the other survivors, Mia Bennett and Yuri Kerenski, as "little people". An indignant Adelaide shot back that "the Time Lord Victorious is wrong" and subsequently committed suicide, which largely preserved the timeline the Doctor had altered. (DW: The Waters of Mars)
Names given to the Doctor by others
Major
The Evil One
The Sevateem tribe referred to the Doctor as The Evil One, due to the fact that the supercomputer they worshipped had a split personality, one of which was based on that of the Doctor. (DW: The Face of Evil)
Ka Faraq Gatri and other Dalek names
The Daleks referred to the Doctor as the Ka Faraq Gatri, which may mean Bringer of Darkness and/or Destroyer of Worlds. By implication, the name Destroyer of Worlds referred to the Doctor's destruction of the Dalek home planet Skaro in his seventh incarnation, an act for which he would consequently feel some remorse. (DW:Remembrance of the Daleks, NA: Timewyrm: Revelation) However, as early as his second incarnation, the Doctor knew that the Daleks had given him this name, and the Daleks used it prior to the destruction of Skaro. (DWM: Bringer of Darkness, DWN: Remembrance of the Daleks). The name was again used by Davros following his defeat during the Medusa Cascade incident. (DW: Journey's End)
The Dark Lord/The Threefold Man
Dalek Caan referred to the Doctor as "the Dark Lord" or "the Threefold Man" during the Medusa Cascade incident (DW: The Stolen Earth/Journey's End).
The Oncoming Storm
The Daleks also referred to the Doctor as the Oncoming Storm in the myths of their homeworld, as noted by his ninth incarnation, indicating that the Daleks feared him. (DW: The Parting of the Ways) This was also the name given to him by the Draconians, ("Karshtakavaar" in Draconian) who were generally the Doctor's allies, to indicate the traumatic events which so often accompanied his arrival. (NA: Love and War)
Time's Champion
Time's Champion was a title given to the Doctor to symbolise his service to Time during his seventh incarnation. (NA: Love and War)
The Sandman
The Doctor's actions in the past of the Galyari led to his entering their race memory as a legendary monster called the Sandman. (BFA: The Sandman)
Rides In Night
The Doctor was known to the Pawnee Nation by the name Rides In Night. He was also known as The Brother to Coyote. (NSA: Peacemaker)
Fireplace Man
Nickname bestowed upon the Doctor by Madame de Pompadour as a child after he began visiting her through her fireplace (actually a space/time portal). She continued to call him by this name up until she was 23. (DW: The Girl in the Fireplace)
Minor
Doctor Who
The name Doctor Who was applied to the Doctor, intentionally or unintentionally, on many occasions. The computer WOTAN once referred to the Doctor as Doctor Who, for reasons which have never been explained. (DW: The War Machines) Clive Finch also used this name when referring to the Doctor on his website Who is Doctor Who? (DW: Rose), although it was presented more in the form of a question as he tried to investigate the Doctor's origins. K-9 was heard on occasion making playful remarks related to the Who name (KAC: A Girl's Best Friend, SJA: Invasion of the Bane). It is unclear whether the Doctor himself ever actually used the name, although his third incarnation drove an automobile with the licence number "WHO 1" (DW: Doctor Who and the Silurians, et al) and not long before his regeneration was seen driving a futuristic vehicle that possibly apocryphal sources suggest may have been called the Whomobile (DW: Invasion of the Dinosaurs). The Doctor wrote a series of children's books during his time with UNIT which were mistakenly published under this name (BFA: The Kingmaker).
The name was often unintentionally invoked when characters wished to learn who the Doctor was and what his name was: "Doctor? Doctor who?"
Doctor Galloway
Edward Waterfield made up this name for the Doctor when arranging to meet him (DW: The Evil of the Daleks).
The Watcher
The Watcher was the name given to an incarnation of the Doctor partway between his fourth and fifth incarnations, before they realised his true identity. The only individual heard to utter the name was Adric. (DW: Logopolis)
- See The Watcher
Doctor Bowman/James Alistair Bowman
Dr. Grace Holloway invented this name for the the Doctor whilst introducing him to others. (DW:Doctor Who: The TV Movie) The Doctor subsequently used this alias on occasion, filling it out to James Alistair Bowman. (EDA: Seeing I) The "Alistair" in the name was presumably an homage to Alistair Gordon Lethbridge-Stewart.
Doctor Noble
After the Doctor and Donna Noble introduced themselves as "the Doctor and Donna Noble", Solana Mercurio misunderstood and referred to them as "Dr. and Mrs. Noble." (DW: Planet of the Ood)
The DoctorDonna
After saying the phrase "Doctor, Donna, friends" so many times as defense against a group of rabid Ood, the Ood collective adopted this name for the two of them. Ood Sigma promised that generations of Ood children would grow up on the Ood Sphere, singing the songs of "the DoctorDonna." (DW: Planet of the Ood)
- This was a foreshadowing of Donna Noble becoming the half-human/half-Time Lord being known as DoctorDonna. (DW: Journey's End)
Joking aliases and nicknames
Snail or Wormhole
Given to him by his cousins of the House of Lungbarrow, because, unlike Loomed Gallifreyans, he had a bellybutton. (NA: Lungbarrow)
Professor
Ace usually called the Doctor Professor as a term of endearment. She continued to use the term, even after he asked her not to use it anymore. (DW: Dragonfire)
Doc
On rare occasions individuals (often American) such as Peri Brown and Jimmy Stalkingwolf referred to the Doctor as "Doc", usually earning a rebuke from the Doctor (DW: The Twin Dilemma, Dreamland, et al).
Mr. Conditional Clause
Given to him by Luke Rattigan when he was angered by the Doctor's tautology of the Atmospheric Omission System's name as he called it ATMOS System, The Doctor replied harshly to this saying, "No one's said no to you in a long time, have they?" (DW: The Sontaran Strategem)
Mr. Spock
Rose Tyler, annoyed with the Doctor not telling her his name, proceeds to introduce him to Captain Jack as Mr. Spock, after the character of the same name from Star Trek. Jack, not recognizing the reference, proceeded to address the Doctor as Mr. Spock until he was corrected. (DW: The Empty Child)
Dumbo
Donna Noble frequently called the Doctor Dumbo, when she was angry or teasing. (DW: The Runaway Bride, The Sontaran Strategem, et al)
Space man
Donna Noble also often called the Doctor Space Man. (DW: The Runaway Bride, et al)
Spartacus
During a visit to Pompeii, the Doctor used this name, saying "I am... Spartacus" when asked his name. Donna followed him up by saying, in a parody of the 1960 film, "And so am I." (DW: The Fires of Pompeii)
Tom Cruise; Tom Hanks; Michael Caine; Pee-Wee Herman; Harold Knowles
The Doctor used a series of aliases based on popular film actors while visiting 1920s Hollywood. (IDW: Silver Scream)
Pretty Boy
Nickname given to him by River Song. (DW: Silence in the Library)
Gandalf
The Master bestowed this name upon the Doctor after the Doctor was rapidly aged. The name refers to the character Gandalf in the novels of J.R.R. Tolkien. (DW: Last of the Time Lords)