Where does “Nollaig” come from?

Nollaig (Scottish Gaelic) comes from Old Irish Notlaic, from Latin nātālīcia.

Ancestry of “Nollaig”, step by step

Step	Language	Word	Meaning
1	Old Irish	Notlaic	—
2	Latin	nātālīcia	—

Nollaig — Etymology, Origin & Word History | Etymology Explorer