Where does “hæg” come from?

hæg (Norwegian Nynorsk) comes from Old Norse helgr, from Proto-Germanic hailagijō.

Ancestry of “hæg”, step by step

StepLanguageWordMeaning
1Old Norsehelgrholiday, festival
2Proto-Germanichailagijō—
Every word from Proto-Germanic hailagijō →Every word from Old Norse helgr →
hæg — Etymology, Origin & Word History | Etymology Explorer