 Following the Muslim conquest in 634 CE, the basin became an often fought over frontier between the Banu Kalb and their distant kinsmen from the Banu al-Qayn.The lowland gained its current name following the migration of the Sirhan tribe, purported descendants of the Banu Kalb, to the Dumat al-Jandal region from the Hauran .Before their migration, Wadi Sirhan was known as Wadi al-Azraq after the Azraq oasis.