You could probably argue the case for a good etimological link between <i>Duergar</i> and <i>Tuatha</i>.
Hmm. There's a link twixt 'doo-wa' and 'too-wa'. It only seems to takes a small shift of the tongue to make one into the other.
Etymology is a bit arcane to me. It's a shame TomBo's not about, I bet he'd know.
Possibly, but unlikely that a Gaelic word would have been used amongst Brythonic Celts. The welsh counterpart for the "fair folk" is Tylwyth Teg.
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