أردشير الأول
During the Sassanid era, in "Kar-Namag i Ardashir i Pabagan", a short prose work written in Middle Persian, Ardashir I is depicted as having battled the Kurds and their leader, Madig. After initially sustaining a heavy defeat, Ardashir I was successful in subjugating the Kurds. In a letter Ardashir I received from his foe, Ardavan V, which is also featured in the same work, he is referred to as being a Kurd himself. The usage of the term "Kurd" during this time period most likely was a social term, designating Northwestern Iranian nomads, rather than a concrete ethnic group.