Encyclopaedic Ethnography of Middle-East and Central Asia-edited by R. Khanam; the oldest Middle Eastern Tribe, Khafaja can be traced back to the inhabitants of the city of Khafaja in Ancient Sumeria ; where the Temple of Khafaja continues to be known as the best "oval temple" shape of ancient Sumeria. this temple community regulated the affairs of the social community. (See : Imagining Babylon: The Modern Story of an Ancient City
By Mario Liverani) https://books.google.com/books?id=q_189OeDwSMC&dq=khafaja+tribe&pg=PA427