The Doctor's name has not ever been revealed. Very few characters on the show even know it.
Ninth Doctor: Christopher Eccleston
Tenth Doctor: David Tennant
Eleventh Doctor: Matt Smith
Going back in time:
First Doctor: William Hartnell, later played by Richard Hurndall after the former's death
Second Doctor: Patrick Troughton
Third Doctor: Jon Pertwee
Fourth Doctor: Tom Baker
Fifth Doctor: Peter Davison
Sixth Doctor: Colin Baker
Seventh Doctor: Sylvester McCoy
Eighth Doctor: Paul McGann
Enjoy!
Doctor of Osteopathy
The abbreviation DO after a doctor's name stands for Doctor of Osteopathic Medicine.
A doctors name plate is typically called a name tag. It is worn by the doctor, on top of their scrubs and has the name of the doctor and his/her title on it.
An OD after a doctor's name refers to the individual being a doctor of optometry. These doctors are responsible for providing care for the eyes.
Doctor Of Medicine
Colin Baker played the Doctor in 1993; however, the Doctors name is literally always the Doctor.
It could stand for Doctor of Optometry, or Doctor of Osteopath.
Doctor of Medicine
Doctor of HYPnosis
M.D. after a doctor's name stands for Doctor of Medicine.
Artis Medicinae Doctor (Latin: Doctor of Medicine)
A doctor with M.D. after his or her name is a Doctor of Medicine and is a type of medical physician.