Abstract
This article examines the onomastic space of the medieval Mamluk-Kipchak written monument-the manuscript “Baitaratu’l-vazih”, with a particular focus on the linguistic and semantic features of theonyms and anthroponyms. The aim of the study is to identify religiously marked proper names in the text, analyze their structural, phonetic, and semantic characteristics, and determine their continuity with modern Kazakh usage. Theonyms and anthroponyms are systematized within the textual context, and their functions and semantic load are clarified. The research employs historical-comparative and lexical-semantic methods, revealing the interaction between ancient Turkic worldview and Islamic tradition. As a result, the role of onomastic units in the manuscript “Baitaratu’l-vazih” is defined in representing the religious and cultural system of the medieval Kipchak language. The scientific novelty of the study lies in the fact that theonyms and anthroponyms of this written heritage are, for the first time, comprehensively analyzed within the framework of onomastic space and described from a historical-semantic perspective. The findings contribute to a deeper understanding of the lexical system of the Mamluk-Kipchak language and its historical continuity with the modern Kazakh language.