[Tuco]

Originally Posted by Marulus

Great many regions inhabited by Slavic speaking peoples were designated as Sclaviniae in the Middle Ages. In fact, the term has linguistically Greek-Byzantine origin and was initially employed to denote different Slavic political units in the formerly Byzantine territory of Illyricum, Moesia and thrace in the early middle ages (5th-10th century).

You have some sources for that?

The origin is disputed. Some say it is derived from the verb sluti, slovem or from the noun slovo ("letter", "word"), in which case its meaning would be that of "someone who speaks our language", as opposed to Němec ("German", from něm, "mute", meaning someone who does not speak a Slavic language, thus appears to be "mute" when addressed in Slavic).

Yeah, I heard that, but you rather believe that is of Greek-Byzantine origin right?