Where does “graver” come from?

graver (Norwegian Bokmål) comes from Norwegian Bokmål grave, from French gravé, from Middle French grave, from Old French gravé, from Medieval Latin grava, from Gaulish grawa, from Proto-Celtic grāwā, from Proto-Indo-European gʰroh₁weh₂ — to grind.

graver (Norwegian Bokmål): a digger, gravedigger; indefinite plural of grav;...