Kyiv

First recorded in 1805–10 with spelling Kiev; the spelling Kyiv was first recorded in 1950–55; Kiev from Russian Kíev, Kyiv from Ukrainian Kýiv, both from Old East Slavic Kyevŭ; of uncertain origin. Traditional (folk) etymology derives the name from Kyi, one of the legendary founders of the city; another etymology suggests that the name of the city was Sarmatian (Iranian) Kiovi Kii “heights, mountains,” and that its inhabitants, a Sarmatian tribe, were called Kivi “mountaineers”