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.
Mundaka
Others have related the name "Mundaca" to a stock of Basque toponyms with the endings "-aka", "-eka", "-ika", which are especially abundant in Biscay and which can be linked with the Celto-Italic suffix "-aka". To some the origin of the name would be much older and it could be traced back to an era in which Vizcaya could have been populated by a Celtic people.