Doing some exploring I believe I have found the burial sites for two of the daughters of Joseph Treys and Elizabeth Brown. Elizabeth Trayes and her husband William Davey and Mary Trayes and her husband Philip May are both listed on the tree as having immigrated to Canada but location and years of death are not included. Going through the Centreton Cemetery in Centreton, Ontario, Canada have found tombstones where the names and birth years match. Any records for that time would show location as Haldimand, Northumberland, Ontario, Canada as the general area.
To help confirm Mary Trayes and John Runnalls their aunt and uncle are buried in Grafton, Ontario which is about 10 minutes away. John Runnalls sister Philipa Runnalls Wilton is also buried in Centreton. I suspect that William Davey is related to the numerous Davey's in the area just haven't confirmed how.