I realise it's been a long time since this thread began but am hoping you will see this Myra!
My great x4 GM was a Joanna Davey, b. c 1802 in Cornwall. She married Philip Hore in St Austell in 1820, had 8 children and died in St Austell in 1835. She MAY have been the daughter of Joseph Davey and Martha Keast of St Neot.
Do you think there may be a connection? Any information gratefully received!