Twenty Years After
Porthos, Baron du Vallon de Bracieux de Pierrefonds is a fictional character in the novels "The Three Musketeers" (1844), "Twenty Years After" (1845), and "The Vicomte de Bragelonne" (1847-1850) by Alexandre Dumas, père. He and the other two musketeers, Athos and Aramis, are friends of the novel's protagonist, d'Artagnan. Porthos is a highly fictionalized version of the historical musketeer Isaac de Porthau.