a higher status than that of the Earldom of Mornington in the Peerage of Ireland. In the case of the House of Saud the surname "Al Saud" is carried by any descendant of Muhammad bin Saud or his three brothers Farhan, Thunayyan, and Mishari. Al Saud's other family branches, like the Al Kabir, the Al Jiluwi, the Al Thunayan, the Al Mishari and the Al Farhan, are called cadet branches. Members of the cadet branches hold high and influential positions in government though they are not in line of succession to Saudi throne. Many cadet members intermarry within the Al Saud to reestablish their lineage and continue to wield influence in the government. Sons, daughters, patrilineal granddaughters and grandsons of Ibn Saud are referred to by the style "His Royal Highness" (HRH), differing from those belonging to the cadet branches, who are called "His Highness" (HH) and in addition to that a reigning king has the title of Custodian of the Two Holy Mosques. See also Secundogeniture References Nobility Genealogy Kinship and descent