The toponyms Syunik and Artsakh mentioned in the bibliographic information are important for understanding many historical, linguistic and geopolitical issues in general. From the point of view, there is important information in the work of Gukas Sebastassi "David Beck or the story of the Kapantsi". From the study of the place names mentioned here, it becomes clear that after the 15th century, various Muslim tribes began to settle in the territory of historical Syunik and Artsakh. In this work, the location and adjustment of some settlements were made, for example, the name Zeva was given to the Armenian settlements where there were sanctuaries (Arabic: zāviya (زاوية) "place of worship"), Mount Okuziyarat is located in the village of Tandzatap, and it was sanctuary. There are geographical names which have been changed by copying, distorting old names, foreign words. From the etymology of toponyms, it becomes clear that the name of the Tatar River comes from the Indo-European root *dhor- "jump". The name of the Kulaberd province is dialectal and is made up of the words kul "stone" and berd, probably the fortress was built for blows from a slingshot. The Yeritsvank-Artsvanik toponym received the following development: *arg՛- (Indo-European region) > arș (Urartian region) > arets (արէծ) (pre-Grabar period) yerets (երէծ) (Grabar period) > erits (երից) (Middle Armenian period) > ertc (երց) (early Ashkharabar period) > arts (արծ) (new literary Armenian period, from the 19th century). The toponym Urduar-Ordubad has a primordially Armenian composition: in the dialect of Agulis, urd means “field stream”, and var means “to lead”. The place name Agulis is old and comes from the Greek word ἐκκλησία ("church" in Armenian). It becomes clear from the statistics of the Gazar Sebastassi toponyms mentioned that 92% are native or Armenian words created on the territory of Armenia, 3% are new foreign toponyms, 5% are toponyms of unknown origin. According to references and period, toponyms have the following image: BC. 3rd millennium - 5th century: 14%, Early Middle Ages: 5th-9th centuries: 10%, Middle Ages: 9th-13th centuries: 29%, Late Middle Ages: 14th-17th centuries, 47%. In fact, the penetration of Turkic and Kurdish tribes into Syunik began in the 15-16th centuries, and already in the 18th century this phenomenon forced the indigenous population to fight against the invasion of Turkic troops and tribes.