La Fère
The fictional Athos is named after the historical musketeer Armand de Sillègue d'Athos d'Autevielle, though they have little in common beyond the name. His birthplace is the commune of Athos-Aspis in the Pyrénées-Atlantiques department. The name also resembles Mount Athos; in chapter 13 of "The Three Musketeers", a Bastille guard says, "But that is not a man's name; that is the name of a mountain." His title, Count de la Fère, while invented, is tied to the domains of La Fère which were once owned by Anne of Austria, Queen of France in these novels and in the historical period in which they are set.