I made a mistake on your information.I was looking at Yarmouth County, NS when in fact I should have been looking at Inverness & Richmond Counties, NS, as I was reminded today by Stephen White.
He has sent the following information for you.
Pottey (and Potty, Pottie, and so forth) is an English deformation right enough, not of Pothier, but of Pâté.The Pâtés have been an Acadian family in Cape Breton since the 1730's.The family was prominent in L'Ardoise, with branches in Rivière-Bourgeois and on Isle Madame.Ms. Dunne's grandmother, meanwhile, belonged to a Pâté family from West Arichat.Her parents were Firmin Pâté and Sophie Benoit.
John Muise, on the other hand, descended from the Muises of Chéticamp, although his parents, Jean Muise and Vitalline Audot, had settled at New Waterford.
I'm sure you can find the rest online if you search the Cape Breton Genweb site.Again, my apologies for steering you in the wrong direction.Dennis Boudreau