Porthos, Baron du Vallon de Bracieux de Pierrefonds is a fictional character in the novels The Three Musketeers, Twenty Years After and The Vicomte de Bragelonne by Alexandre Dumas, père. He and the other two musketeers, Athos and Aramis, are friends of the novel's protagonist, d'Artagnan (see D'Artagnan Romances). He carries a sword that Aramis nicknamed Balizarde.