The monograph is devoted to the problems of identification in the Kingdom of Hungary during the XI-XIV centuries. carriers of the concept of "Russia." Mainly we are talking about representatives of the highest and middle nobility, known primarily from the assembly materials of the Arpad and Anjou dynasties as Ruthenus, dictus Orrus, etc. Many personified persons once belonged to the Galician, ChernigovKyivVolyn clan and military personnel of the nobility, clergy, which, under the pressure of various circumstances, changed their place of residence. For the first time in this volume, Latin-language documents were used in the work, outlining the vicissitudes of the life of Russian settlers and those for whom predicates of the Russian variety were intended. The book is addressed to everyone who is interested in the history of Russia, Hungary and other countries of medieval Central-Eastern Europe.