In House M.D., Wilson’s first name is James.
Dr. James Wilson is an oncologist at Princeton-Plainsboro Teaching Hospital and Gregory House’s closest friend. Robert Sean Leonard played the character throughout the series, making Wilson one of the show’s most important supporting figures.
Wilson often acts as a moral and emotional counterweight to House. Although he understands House’s intelligence and loyalty, he also challenges House’s behavior and repeatedly becomes involved in the consequences of House’s decisions.
The character’s full name is James Evan Wilson. His surname and role as House’s trusted companion are part of the series’ deliberate Sherlock Holmes parallels: House corresponds broadly to Holmes, while Wilson echoes Dr. Watson. Wilson’s specialty is oncology, but his narrative importance extends well beyond his medical work.