In the 6th century AD Procopius, writing in Byzantine Greek, refers to the Σκλάβοι Sklaboi, Σκλαβηνοί Sklabēnoi, Σκλαυηνοί Sklauenoi, Σθλαβηνοί Sthlabenoi, or Σκλαβῖνοι Sklabinoi, while his contemporary Jordanes refers to the Sclaveni in Latin