Ukrainians (ukraintsi, ʊkrɐˈjinjts(j)i) are an East Slavic ethnic group native to Ukraine. The native language of the Ukrainians is Ukrainian. The majority of Ukrainians are Eastern Orthodox Christians, some Ukrainians are also Catholic Christians.
While under the Polish–Lithuanian Commonwealth, the Austrian Empire, and then Austria-Hungary, the East Slavic population who lived in the territories of modern-day Ukraine were historically known as Ruthenians, referring to the territory of Ruthenia; the Ukrainians living under the Russian Empire were known as Little Russians, named after the territory of Little Russia. The ethnonym Ukrainian, a term associated with the Cossack Hetmanate, was adopted following the Ukrainian national revival. Cossack heritage is frequently emphasized, for example in the Ukrainian national anthem.
The ethnonym Ukrainians came into wide use only in the 20th century after the territory of Ukraine obtained distinctive statehood in 1917. From the 14th to the 16th centuries the western portions of the European part of what is now known as Russia, plus the territories of northern Ukraine and Belarus (Western Rus) were largely known as Rus, continuing the tradition of Kievan Rus. People of these territories were usually called Rus or Rusyns (known as Ruthenians in Western and Central Europe).
The Ukrainian language is, like modern Russian and Belarusian, a descendent of Old East Slavic. In Western and Central Europe it was known by the exonym "Ruthenian". In the 16th and 17th centuries, with the establishment of the Zaporizhian Sich, names of Ukraine and Ukrainian began to be used in Sloboda Ukraine. After the decline of the Zaporizhian Sich and the establishment of Imperial Russian hegemony in Left Bank Ukraine, Ukrainians became more widely known by Russians as "Little Russians" (Malorossy), with the majority of Ukrainian élites espousing Little Russian identity and adopting the Russian language (as Ukrainian was outlawed in almost all contexts).