are the peverells related to slytherin?
Well since Marvolo Gaunt stated that they were decendants of the Peverells and Salazar is a known relaive of the Gaunts and Voldemort the Peverells are therefore descendants of Salazar Slytherin. As, Ignotus Peverell is a descendant of Salazar and is related to the potters as he is there ancestor.