Edward Doucette is on the list of Drummond Island voyageurs that moved to the Penetanguishene area in 1828 when this island became US territory. The voyageurs that remained loyal to the British Crown moved en masse to Penetanguishene. Edward Doucette settled near Lafontaine in Tiny Township but later moved to Mara Point on Lake Simcoe. I do believe your family would be related to this family.
Joanne