Any Suggestions For Researching A Common Name..?

Hello, I have been trying to find my great great grandfather for some time now with no success. He has a more common name than some of my other ancestors whom I have already discovered. I am looking for Juan Perez. What suggestions would anyone have on trying to find him? I have tried looking via his wife, no results. I have tried his children, no results. I have tried the surrounding areas of his children's baptism records, nothing. The time frame of his birth is around 1856.

Thank you,

Kristine