Where does “Árdal” come from?

Árdal (Irish) comes from Old Irish gal, from Proto-Celtic galā — might, ability.

Ancestry of “Árdal”, step by step

StepLanguageWordMeaning
1Old Irishgalvalour; valor; warlike ardour, fury
2Proto-Celticgalāmight, ability
Every word from Proto-Celtic galā →Every word from Old Irish gal →
Árdal — Etymology, Origin & Word History | Etymology Explorer