Gaelic and Sanskrit - and Nuada

As part of my PIE religious exploration I have been doing a bit of
research about the Celtic deity Nuada. (possibly related to Neton, Net,
Nodens, Neit)

I've come across a few etymologies - none of which are pertinent to
this post...

But while looking around I came across some material that said "Nuada
shares the same root as the Welsh word for 'protect' (noddi)
and 'protection' (nawdd). These are related to Irish nacht and Sanskrit
nud- and nudati, 'protect'."
The only word I can even confirm as meaning what was stated is the
Welsh noddi.

Can anyone confirm these other terms?
And can anyone offer a possible PIE root origin for the meaning "to
protect"??

Sincerely,
Aydan