https://en.wikipedia.org/wiki/Kievan_Rus'
Kievan Rus', also known as Kyivan Rus' (Old East Slavic: Роусь, romanized: Rusĭ, or роусьскаѧ землѧ, romanized: rusĭskaę zemlę, lit. 'Rus' land'; Old Norse: Garðaríki), was a state in Eastern and Northern Europe from the late 9th to the mid-13th century. Encompassing a variety of polities and peoples, including East Slavic, Norse, and Finnic, it was ruled by the Rurik ...