Due to the Spanish Inquisition many Jews were expelled from Spain or forced to Convert. Some may find this link below interesting if you have ever wondered about the origins of your Surname. The Spanish Government has agreed to offer Citizenship to those who can prove they are descendants of Sephardic Jews. The Link below is one of many which can be found by doing a bit of research...
https://www.almagorlaw.com/list-of-names