Spain was first named by the Phoenicians, who called it "Land of Rabbits" in their language (something like "spanidja"). The name was kept by the Romans in the form of Hispania. The Greek had called it Iberia, which still accounts for the Peninsula (especially when talking about Spain and Portugal). I read somewhere that Deutsch/Dutch/(te)Desco and all those terms meant something like 'beyond' in clear reference to the 'people who lived beyond the Roman limes', particularly, the Rhein. Finally, in Spanish we say 'EEUU' when referring to the USA.