As you said your family hails from a district quite a distance from Cornwall - but due to the unusual name - it is quite possible that there i some realation. My dad's grandfather's parents(or it might have been just his father)came form England I believe without having the family tree directly in front of me. Preston's father dies when he wa svery young so much beyond this generation was lost. I believe a brother, or same realation emigrated at the same time and went into Canada rather than the US - as stories say handed through the family. I find it interesting that you are also in Canada. It would be interesting to talk if you would like to reply back sometime.
Amber