Jugosloven (Serbo-Croatian) comes from Serbo-Croatian Sloven, from Proto-Slavic slověninъ, from Proto-Slavic slovo, from Proto-Balto-Slavic ślawas, from Proto-Indo-European ḱléwos, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.
Ancestry of “Jugosloven”, step by step
Jugosloven traces back through two separate lines of ancestry.