I have a family chart showing our Booth line, but I cannot verify that the information is correct. It says that my James Booth's father John Booth was a son of Robert Booth and Elizabeth Gaston/Caston of Pennsylvania. (See messages which I just posted to the main Booth board.)
There was also a Booth family that went from MA to DE (Sussex County), where my Booths also appear to have been. I think it's possible that my James Booth may belong to that family, as well.
My Booth family is very difficult to document, unfortunately.