I hate to say this BUT everyone gets the same story about bein the first one's there. Unfortunately I have to tell you that you are incorrect. The first del Rio probably go back to the 1500's to 1600's. I have my 7th great grandfather who is going back into the 1600's to 1700's and as far as I know he had no siblings that came to Puerto Rico with him. Also, you have to be more specific as Puerto Rico may be a small island but quite huge with settlers arriving all the time.