Regional differences existed between the peoples of the different regions of the kingdom and each region could be readily described by contemporaries as a regnum, though each was certainly not a kingdom of its own.
Kuningriigi erinevate piirkondade rahvaste vahel esinesid piirkondlikud erinevused ja kaasaegsed kirjeldasid iga piirkonda valmilt kui regnum, kuigi ükski neist ei olnud iseenesest kindlasti mitte kuningriik.