Scholars have suggested different theories for the origin of the name Kurd. According to the English Orientalist Godfrey Rolles Driver, the term Kurd is related to the Sumerian Karda which was found from Sumerian clay tablets of the third millennium B.C, while according to other scholars, it predates the Islamic period, as a Middle Persian word for "nomad", and may ultimately be derived from an ancient toponym or tribal name, either that of the Cyrtii or of Corduene.