Here's the website for St. George's church, with the memorial and details of the time Pocohontas spent in England:
St. George's Church, Gravesend

Another place with a family connection is Heacham, Norfolk, home of the Rolfe family.

The real Pocohontas story is *far* more interesting than what Disney did to it in the film.

All the best with your research, wilco !

- jeanie