They were most northwestern Serbian group https://en.wikipedia.org/wiki/Serbs_of_White_Carniola

White Carniola Serbian surnames have been recorded since 1551: Mihaljević, Vignjević, Milić, Vukmanović, Dejanović, Dmitrović, Prijić, Radosalić, Stojić, Vojnica, Dragičević/Dragićević, Stipanović, Vidojević, Bunjevac, Mikunović, Selaković, Katić, Jakovac, Vukčević, Paunović, Kordić, Radojčić, Račić, Vrlinić, Radovitković, Mirosaljac, Mirosaljić, Žunić, Vidnjević.


Emission of Radion Television of Serbia about White Carniola Serbs and their culture.