Sheikh

Sheikh — also spelled Sheik or Shaikh or Shekh — is an honorific in the Arabic language. It means "elder" and often means "leader and/or governor". It is commonly used for the front man of a tribe. He can be an Islamic scholar who got this title after graduating from a basic Islamic school. Sheikha is the female term. These are uncommon in the Arabic world. A sheikh who is wise is called "ḥakīm" and can rule.
The word is also generally used for a man over forty or fifty years of age.
Surname.
In Bangladesh, India and Pakistan, "Sheikh" is a common surname among Muslims. It generally means there is Arab ancestry.