Mick Harper wrote: What about, say, Dawlish and suchlike? Or near the Dor valley (which Durdle Dor is).
What about the bleeding obvious? Dor-setshire. Dor might be a gateway to the rest of the country?
Dawlish ortho etymological bollox now follows:
The name Dawlish derives from a Welsh river name meaning black stream. There was also a Roman translation of Dolfisc, meaning 'Dark river' and 'The Devils Water'. It was first recorded in 1044 as Doflisc.
WTF were the Welsh doing naming a place when the local Damnonians were perfectly capable of naming things themselves? But maybe they were too pisht on local cyder or too damaged by Full-Contact Morris Dancing to think of anything coherent?
I've been to Dawlish many times and the river water was always crystal clear, even after heavy rainfall on the Haldon Hills. The only thing black on the river was the imported Black Swans.
As Dawlish is south of Exeter (Isca), is it more likely the name Doflisc means something like "below Isca"? Below might be conflated with dark(?)
A few 100m inland from Durdle Dor you get Scratchy Bottom. It's not a medical condition, it's the real name of the valley where Gabriel Oak's sheep were driven over the cliff by his effing useless sheepdog. If only he hadn't been so distracted by Julie Christie. Well, I would be too. Far From The Madding Etymologists.