I'm also an Alvira and have been researching other Alvira's in PR. My dad is Angel Luis Alvira also from Ceiba and my grandfather was Maximo Perez Alvira and his dad was Feliciano Rivera Alvira. My dad knows very little about the Alvira side of our family. Sometime in the 2000's he went to a funeral in PR and met a ton of Alvira family he didn't know he had. What names do you have? Any info would be appreciated.