I too as a part of my ancestry tree am working on similar possible ties back that far. My great grandmother was Mary Elizabeth Washburn/married George Henry McGann; descended from John V Washburn/married Ruth Rinehart; descended from Abel H. Washburn/married Abigail Vaughn; descended from Thomas Washburn/married Elizabeth ?; descended from Ebenezer Washburn, Jr/married Mary ?; descended from Ebenezer Washburn/married Patience Miles; descended from Joseph Washburn/married Hannah Latham; descended from John Washburn/married Eperience Cooke Mitchell;

I have had a bit of trouble with some research in the New Brunswick and Nova Scotia period when one Washburn was up there....still researching. If anyone has helpful information, glad to reciprocate with what I have.