Hello! My family comes from Cuba and Puerto Rico. While I haven't had much trouble researching my Puerto Rican family, the Cuban side has proven difficult for me to break through. I know from a US census record that my second great-grandfather, Ramon Nunez, had a father from Spain and a mother from Cuba. I've had no success in finding his father, which I believe could result in a huge breakthrough for my research. So, where should I start? Any advice is welcome.