found: Britannica online, June 21, 2017:Slav (Customarily, Slavs are subdivided into East Slavs (chiefly Russians, Ukrainians, and Belarusians), West Slavs (chiefly Poles, Czechs, Slovaks, and Wends, or Sorbs), and South Slavs (chiefly Serbs, Croats, Bosnians, Slovenes, Macedonians, and Montenegrins). Bulgarians, though of mixed origin like the Hungarians, speak a Slavic language and are often designated as South Slavs.)
found: Wikipedia, June 21, 2017:West Slavs (The West Slavs are a subgroup of Slavic peoples who speak the West Slavic languages. They separated from the common Slavic group in c. the 7th century, and establish independent polities in Central Europe by the 8th to 9th centuries; West Slavic speaking nations today include the Czechs, Kashubians, Poles, Silesians, Slovaks and Sorbs. They inhabit a contiguous area in Central Europe stretching from the north of the Baltic Sea to the Sudetes and the Carpathian Mountains in the south, historically also across the Eastern Alps into the Apennine peninsula and the Balkan peninsula)
