People from Galicia, Spain. Also the language spoken by the population (a combination of Spanish, Celtic, and Portuguese.)
Often the butt of Jokes
Spaniards in South/Central American & Caribbean countries are often called Gallegos.
Fidel Castro is of Gallego descent.
Hey Gallego, pass me a soda?
What people from Spain are called by Central and South Americans; can be derogative like "Yankee."
"Look at this gallego - he doesn't even know what a peso is."