خادم الحرمين الشريفين
Sons, daughters, patrilineal grandsons and granddaughters of Ibn Saud are referred to by the style "His/Her Royal Highness" (HRH), differing from those belonging to the cadet branches, who are called "His/Her Highness" (HH) and in addition to that a reigning king has the title of Custodian of the Two Holy Mosques.