Where does “Twoaie ny hErin” come from?

Twoaie ny hErin (Manx) comes from Manx twoaie, from Old Irish túaid — north, in the north.

Ancestry of “Twoaie ny hErin”, step by step

Step	Language	Word	Meaning
1	Manx	twoaie	north, northern; north; caution, circumspection,...
2	Old Irish	túaid	north, in the north

Twoaie ny hErin — Etymology, Origin & Word History | Etymology Explorer