After Dengizich's death, the Huns seem to have been absorbed by other ethnic groups such as the Bulgars. Kim, however, argues that the Huns continued under Ernak, becoming the Kutrigur and Utigur Hunno-Bulgars. This conclusion is still subject to some controversy. Some scholars also argue that another group identified in ancient sources as Huns, the North Caucasian Huns, were genuine Huns. The rulers of various post-Hunnic steppe peoples are known to have claimed descent from Attila in order to legitimize their right to the power, and various steppe peoples were also called "Huns" by Western and Byzantine sources from the fourth century onward.