Complex sentence: Some historians have speculated that the Kumyks may be descendants of the Khazars, such as the Hungarian historian Ármin Vámbéry, who believed that they settled in their present territory during the flourishing period of the Khazar Khaganate in the 8th century.
Split into simpler sentences: Some historians have speculated that the Kumyks may be descendants of the Khazars. Such as the Hungarian historian Ármin Vámbéry, who believed that they settled in their present territory during the flourishing period of the Khazar Khaganate in the 8th century.