Philip Bannister
From Tardis Wiki, the free Doctor Who reference
Philip Bannister was Amy and Martin Bannister's son.
When Martin Bannister was in a nursing home, he began to confuse fantasy and reality. He started to believe he was Doctor Who, the character he had written a television pilot about decades previously. In the fantasy, he travelled in his TARDIS with his granddaughter Susan (based on Amy), Ian (based on Philip) and Barbara (based on his nurse at the home). He eventually succumbed completely to the fantasy. (NOTVALID: Deadline)
