Harry potter and Voldemort are related?

the invisibility cloak was ped down from the 3rd brother to his descendants, which would mean Harry is a descendant of Ignotus Peverall. Voldemorts grandfather claimed that he is a descendant of Cadmus Peverrall which explains the ressurection stone to be in his possesion. So Salazar slytherin could also be a descendant of Cadmus. LONG LONG LONG relation with 1000 years. but still a sound theory.