House of Gaunt

The Gaunts were descendants of Salazar Slytherin. They had a tendency of marrying their cousins to stay pure blood. Voldemort would have been a Gaunt had he taken his mother Merope Gaunt's surname. The Gaunt family also included Merope's brother Morfin Gaunt, a man who used Parseltongue more than English, and their father, Marvolo Gaunt, who respected the legacy of Slytherin the most and had most of the heirlooms. The Gaunts lived just outside Little Hangleton.