Abstract
The heritage, written in the Qypchak language with Armenian graphics, is based on religion, literature, history, law, philosophy, natural sciences and covers the political, economic, historical and cultural spheres of life. Since the 20th century, the Armenian-Qypchak heritage, which has become the subject of close study by scientists, has been published in foreign publications, transcribed, updated with dictionaries and translations. At present, scientists clearly feel the need for a deeper study of the linguistic features of the Armenian-Qypchak heritage, which laid the foundation for various scientific judgments and views.The category of case is one of the relevant and diverse topics in the theoretical grammar of the Turkic languages. The study of this grammatical category is closely connected with the historical study of the Turkic languages and originates from the language of ancient monuments. Based on the works of scientists, the article defines the historical genesis of the category of case, including the genitive case, systematically analyzes their endings in ancient Turkic, medieval monuments, Armenian-Qypchak monuments and modern Turkic languages. The article was written within the framework of the scientific project AP13068438 “Universal and special in the language of the Armenian-Qypchak monuments.”