« Reply #3 on: Saturday 28 November 15 20:03 GMT (UK) »
Don't rule out that your Sewell's came from somewhere else; so many people came to London in the 17th and 18th centuries, for various reasons. My Dowdeswell line came from Gloucestershire in the 1600's, as did my wife's Bentham's from Bedfordshire; her Holloway's came from Herefordshire in the 1700's.
I am Australian, from all the lands I come (my ancestors, at least!)
Pine/Pyne, Dowdeswell, Kempster, Sando/Sandoe/Sandow, Nancarrow, Hounslow, Youatt, Richardson, Jarmyn, Oxlade, Coad, Kelsey, Crampton, Lindner, Pittaway, and too many others to name.
Devon, Dorset, Gloucs, Cornwall, Warwickshire, Bucks, Oxfordshire, Wilts, Germany, Sweden, and of course London, to name a few.