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.
Slavic Native Faith in Ukraine
Slavic Native Faith (Rodnovery) in Ukraine has an unspecified number of adherents which ranges between the thousands and the tens of thousands. A movement within Rodnovery which is unique to Ukraine is the Native Ukrainian National Faith, established by Lev Sylenko in the 1960s among the Ukrainian diaspora in North America, and introduced in Ukraine only in the 1990s.