Where does “europeísta” come from?

europeísta (Spanish) comes from Spanish Europeo, from Latin eurōpaeus, from Latin Eurōpa, from Ancient Greek Εὐρώπη, from Ancient Greek ὤψ, from Proto-Hellenic ókʷs, from Proto-Indo-European h₃ókʷs, from Proto-Indo-European h₃ekʷ- — to see; eye.

europeísta (Spanish): Europeanist