Which preposition to use with sherif

of Occurrences 5%

They lost it morally when this incitement was left unheeded by the Moslem world; they lost it in deed when the Sherif of Mekka asserted his rights as the legitimate guardian of the Holy Cities, drove out the Ottoman garrison from Mekka, and allied himself with the other independent princes of Arabia.

Which preposition to use with  sherif