Winner is 1) Nenad Maksimović
It was really a tough choice, favorites were 1) and 11) and what won was the simplicity + that Slavic pattern.
Once again it was really hard to chose among all these designs, all are viable and all look good for Slavorum. On Facebook we left a text to point out to this thread and we mentioned all other designers that participated in hope that this will help you out with your future business in graphic design.
All in all, neither of the logos would be a bad choice, this is why we are happy with ours!