Celtic origin and derived from *karantos 'friend, ally'.

Likewise, the Slovene name *korotan? may have been adopted from the Latin *carantanum. The toponym Carinthia (Slovene: Koroska < Proto-Slavic *korot'?sko) is also claimed to be etymologically related, deriving from pre-Slavic *carantia.

Carinthia is known as Koruska/ ??????? in Bosnian, Croatian, Montenegrin and Serbian, Korutany in Czech,