name Russia is derived from Rus’, a medieval state populated mostly by the East Slavs. However, this proper name became more prominent in the later history, and the country typically was called by its inhabitants “Русская Земля” (russkaja zemlja), which can be translated as “Russian Land” or “Land of Rus'”. In order to distinguish this state from other states derived from it, it is denoted as Kievan Rus’ by modern historiography. The name Rus itself comes from the early medieval Rus’ people, Swedish merchants and warriors who relocated from across the Baltic Sea and founded a state centered on Novgorod that later became Kievan Rus.
An old Latin version of the name Rus’ was Ruthenia, mostly applied to the western and southern regions of Rus’ that were adjacent to Catholic Europe. The current name of the country, Россия (Rossija), comes from the Byzantine Greek designation of the Rus’, Ρωσσία Rossía—spelled Ρωσία (Rosía pronounced [roˈsia]) in Modern Greek.
The standard way to refer to citizens of Russia is “Russians” in English and rossiyane (Russian: россияне) in Russian. There are two Russian words which are commonly translated into English as “Russians”. One is “русские” (russkiye), which most often means “ethnic Russians”. Another is “россияне” (rossiyane), which means “citizens of Russia, regardless of ethnicity”. Translations into other languages often do not distinguish these two groups.