Caliph
Caliph (kā"lif) , noun
[Old English caliphe, califfe, French calife (compare Sp. califa), from Arabic khalīfan successor, from khalafa to succed (that is a successor of Mohammed).]
Successor or vicar; the civil and religious leader of a Muslim state; -- a title of the successors of Mohammed both as temporal and spiritual rulers, used formerly by the sultans of Turkey.