Fatwa
fatwa: "a legal opinion or decree handed down by an Islamic religious leader" (Merriam-Webster Collegiate Dictionary) or irade:
Selina :)
KHALEEFA
muslims brotherhood
imam
Syedna Mohammed burhanuddin religious leader of dawoodi bohra Shia Muslim community he is 100 years old
Ruholla Khomeini
Ayatollah Ruhollah
Imaam. (pronounced : ee-maa-m
there is no leader i think most ppl just do what prohet muhammad advices
If you mean Muslim ruler, then is called Sultan, Amir, king, or president. If you mean Muslim religious leader, then is called Imam, sheikh, or Amir
The Ottomans were led by the Sultan in political matter and the Caliph in religious matters.