What are the differences between sheikh, emir, sultan and caliph?

sultan kingThe Sultan King is a popular durian cultivar, particularly in Southeast Asia, specifically Malaysia. Renowned for its distinct flavor and creamy texture, it is often considered a top-tier durianThe king of the Kingdom of Bahrain (Arabic: ملك مملكة البحرين Malik Mamlakat al-Baḥrayn) is the monarch and head of state of the Kingdom of e House of Khalifa has been