John Hurved is the earliest reference to the surname 'Hurved' I can find, although he lived in Sandford I can find no reference to him being born in Sandford. This leads me to believe that Hurved is a misspelling of another surname and that he was born somewhere else not too far away.
My best lead so far has been John Hurwood in Poltmore born in 1760 which is only a few miles away just north of Exeter. Interestingly I followed this line of reasoning after I came across a Peter and Elizabeth Hurford in Hemyock, Devon that had a daughter Mary who was incorrectly recorded as Hurved instead of Hurford in one record, they also had a son called John Hurford. But I have no evidence only a hypothethis to tie either of these John Hurfords with this John Hurved.
Possible John Hurved 
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John is 29 degrees from Marie Curie, 43 degrees from Svante Arrhenius, 29 degrees from George Beadle, 31 degrees from Bjørnstjerne Bjørnson, 24 degrees from Lawrence Bragg, 29 degrees from Pearl S. Buck, 29 degrees from Sinclair Lewis, 19 degrees from Guglielmo Marconi, 29 degrees from Albert Michelson, 27 degrees from Gerty Cori, 30 degrees from Roger Sperry and 31 degrees from Chris Ferraiolo on our single family tree. Login to find your connection.