Analysis of sources of the XIII-XVIII centuries. regarding the name of modern Ukrainian and adjacent territories, it is possible to trace in space and time the use of the terms "Rus," "Little Rus," "Ukraine," as well as characterize the dynamics of the process of formation of self-awareness of the modern Slavic population of southern Eastern Europe during the developed and late Middle Ages. For historians, archaeologists, ethnographers, local historians, teachers and students of humanitarian universities, as well as everyone who is interested in the history of Ukraine.