mentions Slavs in "Carnuntum, which is erroneously called Carantanum" (Carnuntum, quod corrupte vocitant Carantanum).

A possible etymological explanation is that it may have been formed from a toponymic base carant- which ultimately derives from pre-Indo-European root *karra meaning 'rock', or that it is of Celtic origin and derived from *karant- meaning 'friend, ally'. Its Slavic name *korotan? was adopted from