If I have correctly identified his birth information, Theophilus Watts was born on 13 Jan 1799, and christened on 27 Mar 1799, in Stoke Damerel, Devonshire, England. His parents were John Watts and Ann Rowe, married on 11 Dec 1792, in Stoke Damerel. (My sources for this are FamilySearch transcripts, provided on the profile.
What is the correct location name, for the birth place field? My guess would be Stoke Damerel Parish, Plymouth Dock, Devonshire, England, but I would very much appreciate some advice from the United Kingdom (or England?) Project.
From what I have been able to find out, Stoke Damerel was the name of a parish in the village of Stoke, owned at the time of the Domesday Book by Robert of Albemarle (whose family was later known as "Damerell"). After 1690, the area at the mouth of the River Tamar, along the Tamar Estuary, was developed as a ship building center, called Plymouth Dock, which seems to have included the parish of Stoke Damerel. In 1823, the town successfully petitioned the king to allow it to be renamed Devonport (in 1824). In 1914, it was merged with Plymouth and East Stonehouse to form (in 1928) the new City of Plymouth.
Sources:
R. N. Worth, ''A History of Devonshire, with Sketches of Its Leading Worthies'', ''Popular County Histories'', London: Elliott Stock, 1886, pp. 223-6.
"Devonport, Plymouth," Wikipedia.org.