I have lots of Cornish Spriggs and some Devon ones, from 1500s continuous to the start of the 19th century when they were all in Stoke Damerel (Plymouth), but one <missing> one I can't quite connect to my Somerset ancestors (most of whom moved to Coventry in the early 20th century). My mystery man is my g-g-grandfather, Thomas Spriggs who claimed in the 1851 census of East Brent, Somerset that he was born in Thorne, Devon. There are Thorne placenames in Ottery St Mary and in Holsworthy. The Ottery registers don't have him in and if the IGI is a good guide, neither does Holsworthy.
I presume that he is either the son of James (bp 1781), Richard (bp 1765), William Wendover Spriggs (bp 1767) or George (bp 1770). Thomas' son was William Spriggs, born 1854 and if one follows a father's or grandfather's name link then he perhaps most likely to be the son of William Wendover or James (whose father was William bp1753, St Martin's by Looe, Cornwall).
He is unlikely to be the son of William Grigory Spriggs, m. first Mary Clark in 1802, and by whose second marriage to
Letitia or Lettice ? there was a further Thomas Spriggs, and the John Spriggs who moved to Utah and fathered a tribe there.