The first name of House M.D. character Wilson is James.
Dr. James Evan Wilson is played by Robert Sean Leonard and is Gregory House’s closest friend. Wilson is an oncologist at Princeton-Plainsboro Teaching Hospital, making him both a medical colleague and an important emotional counterbalance to House.
Where House is abrasive and skeptical of social conventions, Wilson is generally more empathetic and concerned with patients’ emotional needs. Their friendship is one of the show’s main continuing relationships, even when House’s behavior causes serious personal or professional problems.
The character’s full name is James Evan Wilson. “Wilson” is sometimes mistaken for the character’s first name because it is the name used most often in dialogue. His role also parallels Dr. John Watson in the Sherlock Holmes stories, reinforcing the show’s detective influence.