Hi, Moira,
Might seem a bit of a long shot, but..........
I have a stray "CANT".....
She is Martha CANT from BULMER, b1755, d1782
Nothing too interesting there, until I read the rest of your post.... Martha is a direct line descendant of mine, and joins my line by marriage to a Thomas RAYMOND.
I don't know if any of this rings any bells, but I thought I would give you a shout as looking at your Surnames list, her descendants fed into my tree which includes the names ADAMS, SKIPPER and HATTON...
Worth a try,
Steve