"You think I was going to use my filthy Muggle father's name forever? I, in whose veins runs the blood of Salazar Slytherin himself, through my mother's side? I, keep the name of a foul, common Muggle, who abandoned me even before I was born, just because he found out his wife was a witch? No, Harry--I fashioned myself a new name, a name I knew wizards everywhere would one day fear to speak . . . ."
--Voldemort, Chamber of Secrets