Lord Voldemort is the villain in the Harry Potter series, by J. K. Rowling. Also known as "He Who Must Not Be Named," Lord Voldemort was an orphan from birth. Son of a witch and a Muggle man, Lord Voldemort was a bully from birth. His full name was Tom Marvolo Riddle, the letters of which can be jumbled into 'I Am Lord Voldemort' as shown in ' Harry Potter and The Chamber Of Secrets' . Known as Tom Riddle, he terrorized his fellow orphans at the orphanage he was in. Dumbledore (Albus Dumbledore), a teacher and eventually a headmaster of Hogwarts, a school for magic, visited Tom at the orphanage. He, instead of excepting help from Dumbledore, decided to get the things he needed on his own. This was just the beginning of his independence. He was one of the best students at Hogwarts. A member of Slytherin house, he boasted a direct ascendence to the founding, and released the fabled monster of that house, a serpent from the Chamber of Secrets. This event Hagrid was falsely accused of. Voldemort was and is a very dangerous threat to the wizarding community and all of the world. His backstory is revealed in Book Six, Harry Potter and the Half-Blood Prince.
According to Book Six, in which Dumbledore and Harry repeatedly dive into memories to hunt out Voldemort's past, Voldemort, then Tom Riddle, asked former teacher Horace Slughorn about Horcruxes, or multiple souls.