Claire Thompson

Claire was the wife of Alex and the mother of George. She was unable to have children, even though she and Alex tried IVF treatment. In January 2003, their son George was "born", a Tenza who used a perception filter to appear as their son. George had many rituals before going to bed, because of his fears. In 2011, Claire and Alex suggestedthey get him a doctor. Shortly afterwards, the Eleventh Doctor showed up and was Finally able to get George to face and defeat his fears. Claire returned after a night shift to see her boy happy and no longer afraid. (DW: Night Terrors)

Behind the scenes
According to The Brilliant Book 2012, a book that contains non-narrative based information Claire's scripted last name was Thompson. However, there is no indication of any last name in Night Terrors as originally transmitted.