Fidel Castro's grandfather emigrated from Galicia to Cuba. You can think of him as Jewish or Arabic, or whatever you want, but one grandfather was definitely from Galicia. I heard he wore a kilt and played the pipes too!
Now what the other 3 grandparents might have been is a good question.
Magellan was also from Galicia!
Gallician interestingly is under the Portugese language family rather than Spanish. Your Magellan reference made me recall that. I guess the folks forgot how to speak Celtic.