What is the name of Gregory House's older brother in House M.D.?

House M.D. does not establish a named older brother for Gregory House; the show's known sibling is his younger sister, Joanie House.

Gregory's family background is explored only occasionally. His parents are John and Blythe House, and the series identifies Joanie as his younger sister. No canon character is established as House's older brother, so invented names such as John House or Michael House are not supported by the show.

This question tests a common assumption rather than a hidden character reveal. House's intense privacy and the many stories about his parents can make viewers remember additional family details that the series never confirms. His father, John, was a Marine Corps officer and later a minister, while Blythe is portrayed as his mother.

The distinction matters because House M.D. includes many recurring doctors and patients with detailed histories, but not every family relationship is filled in. The canonical sibling relationship presented in the series is House's relationship with Joanie, his younger sister.