The Paeonians were an ancient people that inhabited the areas north of Macedon, between the Thracian and Illyrian tribes. Their language probably had a mixed Thraco-Illyrian origin. The seat of the Paeonian kings was Bylazora. In 360-359 BCE, southern Paeonian tribes launched raids into Macedon, but the Macedons defeated and conquered them. A Paeonian military contingent participated in the expedition of Alexander the Great to Persia.