My great-grandfather, William Hore Davey, was born in St. Austell in 1838. His mother's name was Jenepher Hore, born 1804. The family evidently came from near Roche. There is a farm there called Mollinis that they lived on sometime in the 1700s.
William H. Davey's father's name was also William. I think he was born in Sheviock. My great-grandfather married Selina Metherell in Tavistock in 1863. By the 1870 census, they were living in Calumet, Michigan, USA. He died there in 1898. He was a copper miner in Cornwall, Devon, and Michigan.
I also had family from St. Cleer but their last name was Jeffery.