Harry Potter: Why do you care how I escaped? Voldemort was after your time.

Tom Riddle: Voldemort is my past, present and future.

(Tom writes his name in the air: “Tom Marvolo Riddle” then makes it rearrange to make it spell “I am Lord Voldemort”)

Harry Potter: You. You’re the Heir of Slytherin. You’re Voldemort.

Tom Riddle: Surely you didn’t think… I was going to keep my filthy Muggle father’s name? No. I fashioned myself a new name, a name I knew wizards everywhere… would fear to speak when I became the greatest sorcerer in the world.

From Harry Potter and the Chamber of Secrets (2002)