Tom Marvolo Riddle. A filthy Muggle name. Unbefitting for a great wizard of his stature. He was a descendant from the great Salazar Slytherin himself and his mother gave him such a disgusting name for one of their lineage. He could not use the name of his dirty Muggle father any longer. It was insult to his ancestry, to his Pureblood views and to his belief that he was a great wizard.
He would fashion himself a new name. A name that would be as great and terrible as him. One that would strike fear into the Wizarding World.
Voldemort.