Sorbs ),  East Slavic  (including Belarusians ,  Russians  and  Ukrainians ) [ 8 ] , and  South Slavic  (including  Bosniaks ,  Bulgarians , Croats ,  Macedonians ,  Montenegrins ,  Serbs  and  Slovenes ). For a more comprehensive list, see the section below on ethnocultural subdivisions. According to  a 2007 genetic study