Slavs
Slavs can be further grouped by religion. Orthodox Christianity is practiced by the majority of Slavs. The Orthodox Slavs include the Belarusians, Bulgarians, Macedonians, Montenegrins, Russians, Serbs, and Ukrainians and are defined by Orthodox customs and Cyrillic script as well as their cultural connection to the Byzantine Empire (Serbs also use Latin script on equal terms). Their second most common religion is Roman Catholicism. The Catholic Slavs include Croats, Czechs, Kashubs, Moravians, Poles, Silesians, Slovaks, Slovenes, and Sorbs and are defined by their Latinate influence and heritage and connection to Western Europe. There are also substantial Protestant and Lutheran minorities especially amongst the West Slavs, such as the historical Bohemian (Czech) Hussites.
Ukrainian Soviet Socialist Republic
The idea of Ukraine as borderland crept in the English language at some point. Therefore, while Ukraine was part of the Soviet Union, Anglophones referred to the Ukrainian SSR as "The Ukraine". However, since the fall of the Soviet Union, the officially recognized name is simply "Ukraine". The definite article may imply that it is a land or general geographic area with unidentified borders.