Where does “slav” come from?
slav (English) comes from Middle English sclave, from French esclave, from Medieval Latin sclavus, from Ancient Greek Σκλάβος, from Ancient Greek Σκλαβηνός, from Proto-Slavic slověninъ, from Proto-Slavic slovo, from Proto-Balto-Slavic ślawas — to cover; to incline.
Ancestry of “slav”, step by step