This isn’t so much a folklore post as proof that cutting remarks have not been invented by the users of social media. Or at least that’s the way I’m interpreting it (I think you can’t help but hear it read in a pompous voice, and I think things like ‘to whom we are, no doubt, indebted’ and ‘expressly stated’ are not kindly phrases. And I think confounding placenames in Wales is probably quite easy especially if you aren’t Welsh):
I am indebted to Professor J.E. Lloyd for most kindly furnishing me with the following note with reference to the name of the camp:-
“It was Pennant who first, in his Tour of North Wales in 1773, took note of the remarkable hill-fort above Llanbedr-y-Cennin. He understood it to be known in the district as ‘Pen Caer Helen,’ and scaled the height in the hope of finding some traces of the Roman road style ‘Sarn Helen’. In this respect he was disappointed, though the discovery of the fort was ample compensation.
‘Pen Caer Helen’, we are assured in the Gossiping Guide to Wales was a mispronunciation of the actual name, ‘Pen Caer Llin’; Mr Egerton Phillimore, to whom we are, no doubt, indebted for the correction (Y Cymmrodor, xi, 54) does not mention his authority.
The ordinary form is the shortened one – ‘Pen y Gaer’ – under which the place appears in the old one-inch Ordnance Survy Map of the district (engraved in 1841).
In the notes to Lady Charlotte Guest’s edition of the Mabinogion, Pen y Gaer is identified with the ‘Kaer Dathal (or Dathyl)’ of theRed Book text. In order to dispose of this conjecture, it is enough to point out, as Mr Phillimore has done, that Caer Dathal is expressly stated to be in Arfon (Rhys and Evans’s text), while Pen y Gaer is in Arllechwedd Isaf – two districts which a mediaeval writer was not in the least likely to confound.
Moreover, Caer Dathal was near the sea, and not far from Aber Menai, Dinas Dinlle and Caer Arianrhod, as may be seen from the references to it in the Mabinogion.”
From ‘The Exploration of Pen-y-Gaer above Llanbedr-y-Cenin’ by Harold Hughes, in the 1906 volume of Archaeologia Cambrensis.
Yes, because god forbid a Woman might have thought of something they haven't.
Edit: Also, you can see the sea from Pen y Gaer.
Hah. In your face Professor Lloyd.