This is probably not relevant, but my great x 3 grandmother was one Martha Acton, born in the North West of England in 1810 and christened (oddly enough) Mattie Acton. She is the only 'Mattie' I have found in searches of baptism records all over the country for this period. It just struck me as being an unusual name for the time, especially for a girl. Do you have English/Irish ancestors that your family know of??