The surname of House M.D.’s original female diagnostic fellow Allison is Cameron. Dr. Allison Cameron is played by Jennifer Morrison and joins House’s first diagnostic team alongside Foreman and Chase.
Cameron is an immunologist by specialty and is known for her compassion, idealism, and strong concern for patients. Her ethical instincts often place her at odds with House’s aggressive investigative methods, although she also recognizes his diagnostic brilliance.
The character’s personal history influences her medical outlook, including her experience caring for a spouse with serious illness. Her relationship with Robert Chase becomes another continuing storyline within the diagnostic team.
Cameron is sometimes confused with later female members of House’s teams, including Remy “Thirteen” Hadley and Martha Masters. Those characters belong to different periods of the series and are not the Allison named in the question.