As has already been stated, Tuathal comes from Proto-Irish *Touto-walos
> There are two words _túath_ the first could be translated as people,
> tribe, nation. The second is used in compounds (túath-) and has the
> meaning northern, left, on the left, perverse, wicked, evil.
> (according to DIL)
> Macbain gives Rhys suggetion that Scots Gaelic _tuath_ 'north' may
> come from *do-huth < to-su 'turning to'. The root being _su_ 'turn'.
> Whether the two OI words are related still seems to me to be an open
> question. Unless some one knows of a surer etymology?
I have been wondering about this for some time now. There was an archaic
Breton word "tuth" meaning "demon" (found in the life of St. Maudez:
"contigit quadam diie, absente magistro suo, quidam daemon quem Britones
tuthe apellant coram eis apparuit") which some have connected to this Irish
word.. Pokorny (IEW, 1079) suggests that tuath comes from PIE *teu- "to
listen, observe" ("in freudlichem Sinne die Aufmerksamkeit zuwenden,
aufmerken"). Here os what he specifically says: "kelt. *teu-to- in mcymr.tut
`Zauberer', mir. tuathaid ds., air. tuaith `nördlich', mir. tuath `links,
nördlich, böse' (aus `*günstig, gut' als Antiphrasis zur Bezeichnung der
- Chris Gwinn