We know of the BERTRAM family via Martha BERTRAM who was bap March 16, 1648/9 in Marshfield, GLS, d/o Samuel. We think her mother was Mary, based on a Monumental Inscription (MI) for a Mary, wife of Samuel, August 1678, Marshfield.
Martha married William BUSH Feb 22, 1668/9, Cold Ashton, GLS. She was buried there May 15,1733. This couple is well documented in Cold Ashton. Husband William's grandparents were from/in Bitton. The children of William/Martha are also documented in Bitton, including son William/Eleanor nee ENGLAND.