The Baiounitai (Greek: Βαϊουνίται) or Vayunites (Macedonian: Вајунити, Bulgarian: Ваюнити, Serbo-Croatian Cyrillic: Вајонити, војници)[a] were a Sclavene (South Slavic) tribe which settled the region of Macedonia at the end of 6th century.
They belonged to a group of Slavic tribes that unsuccessfully tried to capture the city at the beginning of the 7th century, after which they are believed to have migrated to the region of northern Epirus, between Ioannina in Greece and Himara in Albania.
In the 6th century many Slavic tribes populated the wider region around the Byzantine city of Thessalonica.
614–616 the Baiounitai and other neighbouring Slavic tribes united under a leader named Chatzon and besieged the city.
According to some, the Baiounitai moved from Macedonia to the territory of Epirus, and settled the region north of Ioannina.