The East Slavic languages constitute one of three regional subgroups of the Slavic languages, distinct from the West and South Slavic languages. East Slavic languages are currently spoken natively throughout Eastern Europe, and eastwards to... Wikipedia
Early forms: Proto-Indo-European: Proto-Balto-Slavic > Proto-Slavic > Old East Slavic
Geographic distribution: Eurasia (Eastern Europe, Northern Asia, and the Caucasus)
Linguistic classification: Indo-European > Balto-Slavic > Slavic > East Slavic