Indeed it does confirm that the change was necessary:
In PoTC, though, he's François de Hadoque, he's French, and if he reaches rank 7 then he's Chevalier François de Hadoque. I'm not sure whether that should become Chevalier François or Chevalier de Hadoque.Sir Francis was the captain of three-masted armed naval vessel The Unicorn, which he was forced to blow up when it was commandeered by the infamous pirate captain Red Rackham. Sir Francis escaped the ship and lived among the natives of a tropical island close to where the Unicorn sank for two years before being rescued and returned home.