Eureka (word)
"Eureka" comes from the Ancient Greek word "heúrēka", meaning "I found (it)", which is the first person singular perfect indicative active of the verb "heuriskō" "I find". It is closely related to heuristic, which refers to experience-based techniques for problem solving, learning, and discovery.
Carantania
Another possible etymology 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 *"karantos" meaning 'friend, ally'. Its Slovene name was adopted from the Latin *"carantanum". The toponym "Carinthia" (Slovene: < Proto-Slavic "*korǫt’ьsko") is also claimed to be etymologically related, deriving from pre-Slavic *"carantia". The name, like most toponyms beginning with *Kar(n)- in this area of Europe, are in turn most likely linked to the pre-Roman tribe of the Carni that once populated the eastern Alps.