As the saying goes, don't put the cart in front of a horse. The Biskupija church records are the way to go. There you will find his birth and parents names. Do not get hung up on the first name Brunovasa. It could all be in pronounciation, if it was given by an English speaking person that never heard a Slavic first name.Just look at some of the census how butchered most of the Slavic names are. Branislava is a female and Branislav a male.