I've compared your Ravna Gora births to the data of Ellis Island Belobrajdics that I've been working on.
It appears that three children of Juraj and Maria Belobrajdic are in the immigration records: Anton to Shreveport in 1904 for two years, back to Croatia briefly and then to Memphis in 1906; Juraj (Jr.) to Pittsburgh in 1905; and Josephus (Josip) to St. Loius in 1908. This appears to leave the family without male sons in Croatia, unless one or more returned. Anton is listed as being from Sije, which is the same zip code as Ravna Gora.
The only other one I can match up is Nicolaus and Thereza Belobrajdic's son Franciscus (Franjs from "Rosa", which is probably "Kosa", just west of Ravna Gora) to Norfolk in 1902.
Many of the Ellis Island immigrant records couldn't be matched since they are for people born after 1884.