The purpose of this study is to carry out historical reconstruction, to create a probable structural model of the existence of a special ethnopolitical enclave, which was part of the Khazar Kaganate. By comprehensive analysis of fragmented data from written, numismatic and archaeological sources placed in an appropriate spatiotemporal context (southeast of Eastern Europe in the early Middle Ages), it is planned to obtain a holistic picture of the historical development of the Alano-Bulgarian population of North-West Khazaria at the end of the 7th - third quarter of the 10th centuries. The main characteristics of this population are to be determined (ethnic, social, geopolitical), recreate the directions and likely prospects for its development, forms of contact with neighbors, causes of death and disappearance.