Višeslav of Serbia

Boïsesthlabos (Greek: Βοϊσέσθλαβος), transliterated as Višeslav (Serbian Cyrillic: Вишеслав) or Vojislav (Serbian Cyrillic: Војислав), is the first Serbian ruler known by name, who ruled in c. 780. Serbia was a Slavic principality, subject to the Byzantine Empire, located in the western Balkans, bordering with Bulgaria in the east. Mentioned in the De Administrando Imperio (DAI) from the mid-10th century, Višeslav was a progenitor of the Serbian ruling family, known in historiography as the Vlastimirović dynasty. He was descended from the unnamed "Serbian prince" who led his people to the Dalmatia province and established hereditary rule under Byzantine suzerainty. The names of Višeslav's predecessors were not included in the DAI. The dynasty ruled the Principality of Serbia from the early 8th century until around 960.