Pannonian Rusyns
Rusyns in Pannonia, or simply Rusyns or Ruthenians (Rusyn: Руснаци or Русини, Serbian and Croatian: Rusini (Русини in Serbian Cyrillic)), are a Slavic minority in Serbia and Croatia. They are officially considered a separate nationality in Serbia and Croatia. They are also considered to be a part of the northern Rusyns (Ruthenians) who live mostly in Ukraine and in Slovakia, Poland, Romania, Czech Republic, and Hungary.
The main difference between Rusyns in Pannonia and northern Rusyns is language: The language of the Rusyns in Pannonia has more Western Slavic features than the language of the northern Rusyns.
Read more about Pannonian Rusyns: Location, History, Language