Thats very interesting. Where did you get this info from? I'm also from Puerto Rico but currently residing in the States. At least this theory of where our last name comes from is little more flattering than some of the other suggestions I've recieved. Some have made references to a long line of career criminals. LOL. But our name did originate in Spain of that I am sure. I have come in contact with a few
Paniagua descedants from Spain. If anybody has any clues or rumors that you have heard please let me know and I'll try and find some truth behind it.