I think the name should be also Serbian. That is my name and my grand-father's name and we are 100% Serbian since always. Though it is archaic name, there are many people with that name in ex-Yugoslavia and all of them I think are Serbian. [noted -ed]
This is in Orthodox religion, the name of the God of Thunder! The bearer of this name is considered to be a very strong and powerful person, to whom the gods open up all the roads.