Ibn el Shayr, of the Asyr tribe. Dahban, of the Kahtan Arabs, one of the most powerful tribes of the Eastern Desert. Derb Ibn el Okeyda, a wady inhabited by the Refeydha tribe, who belong to the Asyr. They are strong in horses. Derb Selman, of the Refeydha tribe. Wakasha, of the Abyda Arabs. In the district of Abyda is the town of Aryn, in a very fertile territory.