Unfortunately I don't have John Peyton Porterfield in my file. I can tell you the history of the Porterfield name if that would help. Came from Scotland, oldest known ancestor was a Norman knight, Alanus de Porter back in the 1100's.
Let me know if you need more history of this family. Can you tell us other Porterfield names? That might help find the right Porterfield branch for you.