Where does “euro” come from?

euro (Ido) comes from German Euro, from German Europa, from Middle High German Eurōpā, from Latin Eurōpa, from Ancient Greek Εὐρώπη, from Ancient Greek ὤψ, from Proto-Hellenic ókʷs, from Proto-Indo-European h₃ókʷs — to see; eye.

euro (Ido): euro