Arbab (Persian: ارباب‎‎) is a Persian word that means "boss", "master" and "landlord". It was a title used by tribal leaders in Middle East and South Asia. It is the title used by the heads of the Kasi Pashtun in Balochistan and Khalil, Momand, Daudzai and Gigyani tribe in Khyber Pakhtunkhwa.