My ancestor William Lance married Elizabeth Evamy in Blandford Forum in 1732. She died in 1738, and William then promptly married Sarah Evamy. I assume that these Evamys were sisters, but I know nothing more about them except that they came from Tarrant Monkton (which is not far from Wimborne).
Have you made any progress on the Evamys since you posted that query in 2006? I would be very interested to make a connection that led to more information about the Evamy family.
Chris Lance