I reworked the appearance of Rościsław, giving him a vulture-ish head while the clothes aren’t much changed.
Once again the appearance is inspired by Polish Cossacks
Weren’t polish cossacks actually zaporozhian cossacks? If I remember correctly, some units were hired from Zaporozhian Sich in 1572 to join the Commonwealth military as mercenaries, and were called “Registered Cossacks”.
I think so from my (limited) reading on the subject. But there were a lot of cossack hosts – the Zaprozhian, the Don, the Kuban, etc.