omg, I love your style so much !
I really like siblings theory XD and want to see Ukraine in manga(she's much cuter than Belarus XP) ;__;
I see all Slavs as one blonde family XD esp with Ivan and Feliks opposite personalities :P
You know, there is a legend of "Lech Czech and Rus" that every Polish learns in elementary school XD
from Wikipedia:
"In the Polish version of the legend, three brothers went hunting together but each of them followed a different prey and eventually they all traveled in different directions. Rus went to the east, Čech headed to the west to settle on the Říp Mountain rising up from the Bohemian hilly countryside, while Lech traveled to the north until he came across a magnificent white eagle guarding her nest. Startled but impressed by this spectacle, he decided to settle there. He named his settlement (gród) Gniezno (Polish adjective from gniazdo, or "nest") and adopted the White Eagle as his coat-of-arms which remains a symbol of Poland to this day"

this is one of history themes that i want to draw with Hetalia characters xD