What is Gregory House’s father called in House M.D.?

Gregory House’s father is called John House in House M.D.

John House is identified as Gregory House’s father in the series’ character history. He served as a Marine Corps pilot and later became a minister. Gregory’s relationship with him is complicated, particularly because Gregory eventually learns that John was not his biological father.

The revelation appears in the episode “Birthmarks,” when Gregory investigates family information after John’s death. A DNA test confirms that Thomas Bell, a family friend, was Gregory’s biological father. John nevertheless remained the man who raised him, making the distinction between biological parentage and lived family relationships central to the storyline.

This detail is easy to confuse because the show uses several fathers and father figures in different characters’ stories. John House is the legal and social father associated with Gregory’s upbringing, while Thomas Bell is the biological father disclosed later. The names are separate facts within the same family plot.