Still waiting on some good ideas for the names of the weapons...
Leg Biter? Head-cleaver? Bloodletter? How about Bone-splitter? Or the nice, simple Carnage? My personal favourite is for Head-cleaver, but [insert name]'s Axe can also work. Like Boethiah's Axe, Mehrune's Axe, Hrothgar's Axe, etc.
The name could also be dependent on the type of axe; francisca, bearded, double-bladed, battle or war, valaska, pole axe. Would at least give us more non-sword options to play around with.