Não, Harry não é descendente de Godric Gryffindor, mas é descendente dos irmãos Peverell de O Conto dos Três Irmãos e os donos das saliências originais do lado paterno. Daí Harry possuir uma capa de invisibilidade perfeitamente imaculada. Ironicamente, foi a família de Voldemort que acabou com a Pedra da Ressurreição, que tinha o brasão de armas de Peverell gravado nela. JKR afirmou enfaticamente que Harry e Godric Gryffindor não estão de forma alguma relacionados.
Em uma entrevista ao The Leaky Cauldron em 16 de julho de 2005, JKR disse:
MA: What about Harry's family — his grandparents — were they killed?
JKR: No. This takes us into more mundane territory. As a writer, it was more interesting, plot-wise, if Harry was completely alone. So I rather ruthlessly disposed of his entire family apart from Aunt Petunia. I mean, James and Lily are massively important to the plot, of course, but the grandparents? No. And, because I do like my backstory: Petunia and Lily's parents, normal Muggle death. James's parents were elderly, were getting on a little when he was born, which explains the only child, very pampered, had-him-late-in-life-so-he's-an-extra-treasure, as often happens, I think. They were old in wizarding terms, and they died. They succumbed to a wizarding illness. That's as far as it goes. There's nothing serious or sinister about those deaths. I just needed them out of the way so I killed them.
MA: That sort of shuts down Heir of Gryffindor [theories], as well.
JKR: [Pause.] Yeah. Well - yeah.
MA: Another one bites the dust.
The Snitchseeker
Harry é muito parecido com Voldemort através da linha Peverell, de acordo com J.K. Rowling.