THREE SOURCES – THREE COMPONENTS IN THE AREA OF GEOGRAPHICAL NAMES ENDING ON -LEI/-LYAI

The purpose of the scientific article is to establish main historical sources inventory and subsequent comparative-historical interpretation geographical names in Oka Sura regions, compare three approaches this problem, reflected works well-known scientists: historian I.K. Engevatov, linguists G.P. Smolitskaya D.V. Tsy­gankin. results study practical terms are designed to: 1) enrich update relevant articles on onomatology comparative studies Finno-Ugric scholars, Turkologists Slavists; 2) clarify views historians ethnologists/ ethno­graphers about specific moments ethnic linguistic contacts Eastern Europe (in regions). research future should initiate new devoted a particular class nomenclature perspective within boundaries Slavic, Turkic languages.