Answer by
amswplusone (652)
The Doctor has no name, saying of himself "it's The Doctor. " Once he is given the alias "Qui Quae Quod" (masculine/feminine/neutral form of Latin 'who'), and is once referred to as "Thete" (a reference to Theta Sigma, an old nickname). Even 'Doctor Who' is not typically used as his name, but rather just to reference him ("The Doctor? Doctor Who? ").