Tom Riddle learned of Horcruxes in 1943 when ... It was only when he began digging into his past and realized that there was no Marvolo Riddle to ever attend Hogwarts that he realized his magical ...

None of them loom quite as large as Voldemort, though. Originally named Tom Marvolo Riddle and played, after he regains corporeal form in "Harry Potter and the Goblet of Fire," by Ralph Fiennes ...