Who exactly is her heir-general today? I know that Prince Pedro of Bourbon-Two Sicilies is the heir-general to the ancient kingdom of Navarre. But I was wondering about the genealogical representative of this queen of France (consort of the famous Sun King Louis XIV) whose grandson assumed the throne of Spain as King Felipe V -- thereby sparking the War of the Spanish Succession.

Of course, it goes without saying that he (the second son of her eldest son) was not her senior heir, since her male descendants in the male line of her first son (the old Legitimists) were to inherit the French throne. But since the Spanish succession has traditionally been bound by the Castilian law (i.e. male-preferred primogeniture), she could still have genealogical representatives through that eldest son.