6th-century Slavs

founders of the medieval city of Kyiv

Daurentius () or Dauritas () was a Slavic (Sclaveni) chieftain in the 6th century. He seems to have been the supreme chief of a Slavic tribal confederation, which "fellow chiefs" were either subordinated to him or of a similar tribal rank and status as Daurentius.

Ardagast or Radogost (Ancient Greek: Ἀρδάγαστος Ardagastos; Cyrillic: Ардагаст; fl. 584–597) was a 6th-century Sclaveni brigadier (chieftain), alongside Peiragastus/Peragastus (594), under rex Musokios, mentioned by Theophylact Simocatta.

Musokios was a 6th-century Sclaveni rex that ruled around 593, during Maurice's Balkan campaigns, mentioned by Theophylact Simocatta.

Mezamir (, ; 560) was the chieftain of the Antes, an early Slavic tribal confederation in Eastern Europe, believed to have been active around the year 560, at which time the Avar expanded further into Europe. He was the son of Idariz, and had a brother, Kelagast. Mezamir was recorded by Menander Protector (fl. 558–582). Mezamir was described as "powerful", and had most likely established a Slavic confederation sometime before the 560s, which initially thwarted the Avar khaganate. At this time, the Antes were subject to the Byzantine Empire, ruled by Justinian I (r. 527–565), with the supreme c