Marvolo Gaunt
Marvolo Gaunt was one of the last descendants of Salazar Slytherin and the father of Merope and Morfin Gaunt. He was also the grandfather of Tom Riddle who later became Lord Voldemort.

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Marvolo Gaunt was one of the last descendants of Salazar Slytherin and the father of Merope and Morfin Gaunt. He was also the grandfather of Tom Riddle who later became Lord Voldemort.
A Maledictus was a woman in the wizarding world who was cursed with a blood curse that made her permanently transform into a creature after the curse was complete.
Squibs were people who did not possess the ability to perform magic despite having at least one witch or wizard as a parent. They were similar to Muggles expect that they had magical parents.
Vincent Crabbe was a student at Hogwarts School of Witchcraft and Wizardry. He was sorted into the Slytherin house along with his friends Draco Malfoy and Gregory Goyle.
Mary MacDonald was a British witch and a student at Hogwarts School of Witchcraft and Wizardry. She was sorted into the Gryffindor house and went to Hogwarts the same time as Lily Evans.
Bulbadox Powder is a magical product sold in joke shops of the magical world that would cause boils or blisters on the skin of someone who came in contact with it.
Amos Diggory was a British wizard and the father of the Triwizard Champion Cedric Diggory who died during the final championship task.
Alecto Carrow was a British witch and a Death Eater who was a follower of Lord Voldemort. She was the sister of Amycus Carrow.
Frank Bryce was a Muggle gardener and a caretaker of the Riddle house in Little Hangleton. He was accused of the murder of Tom Riddle Sr and his parents.
Euphemia Potter was a British witch and wife of Fleamont Potter. She was the mother of James Potter and the paternal grandmother of Harry Potter.