I think if we're being pedantic, the character's name is "The Doctor". The TV show is named "Doctor Who" but the character doesn't call themself that and a name is what something is called.
reply[Edited to avoid assigning a gender to a character who has had different genders]
And, I think, the last of them remaining.
replyThe Master always comes back, of course. They're such perfect frenemies.
reply(Depends on the era of course, sometimes there are other timelords, sometimes not.)