Social differentiation in Great Moravia reached the state of early feudalism, creating the social basis for development of later medieval states in the region. The question what happened to Great Moravian noble families after 907 is still under debate. On the one hand, recent research indicates that a significant part of the local aristocracy remained more or less undisturbed by the fall of Great Moravia and their descendants became nobles in the newly formed Kingdom of Hungary. The most prominent example are the powerful families of Hunt and Pázmán. On the other hand, both Anonymous and Simon of Kéza, two chroniclers of the early history of Hungary, recorded that the prominent noble families of the kingdom descended either from leaders of the Magyar tribes or from immigrants, and they did not connect any of them to Great Moravia. For example, the ancestors of the clan Hunt-Pázmán ("Hont-Pázmány"), whose Great Moravian origin has been advanced by Slovak scholars, were reported by Simon of Kéza to have arrived from the Duchy of Swabia in the late 10th century.