What is "jaff"

The Jaff people (also Jahf, Jaaf, Jaf, Caf or جاف) are native to the northern and central Zagros area, which is divided between Iran and Iraq. The Jaff tribe originated in the year 1114 by Kurdish King Zaher Beg Jaff. The Jaff dialect (called Jaffi) is part of Sorani, a south-southeastern branch of Kurdish language family. The region inhabited by this tribe is southwest of Sanandaj all the way to Javanroud, and also areas around the city of Sulaimaniyah in Southern Kurdistan. Once nomadic, the Jaff have more recently settled into a predominantly agricultural way of life and are often known as one of the most educated and highly intellectual tribes of the Kurds.