Dr. House’s full first name in House M.D. is Gregory.
The character is formally named Gregory House, M.D., although nearly everyone calls him simply “House.” The surname and his deductive approach deliberately echo Sherlock Holmes, whose first name is also associated with a highly distinctive fictional detective.
Gregory House is played by British actor Hugh Laurie. The character works as a diagnostician and leads teams that investigate unusual or unexplained illnesses. His abrasive personality, dependence on a cane, and reliance on prescription pain medication are central parts of the series’ characterization.
The first name is sometimes confused with the actor’s name or with the character’s title. “Dr. House” is the common spoken form, but Gregory is the canonical given name used in character biographies and dialogue.