“Those whom I could persuade to talk told me that Riddle was obsessed with his parentage. This is understandable, of course; he had grown up in an orphanage and naturally wished to know how he came to be there. It seems that he searched in vain for some trace of Tom Riddle senior on the shields in the trophy room, on the lists of prefects in the old school records, even in the books of Wizarding history. Finally he was forced to accept that his father had never set foot in Hogwarts. I believe that it was then that he dropped the name forever, assumed the identity of Lord Voldemort, and began his investigations into his previously despised mother's family—the woman whom, you will remember, he had thought could not be a witch if she had succumbed to the shameful human weakness of death.