A mabrigash is an Ashlander witch-warrior, a renegade wise woman who has forsaken the established rules of behavior for an Ashlander woman to become a master of dark magic and the weapons of war. By secret rituals the mabrigash steals a man's vital essence and makes herself a powerful о sorcerer and о warrior. The manifestation of her dark power is called a 'ghost snake' that paralyzes and drains a victim's vitality.
From different dialoges:
I have not the arts of war, but I am a wise woman, and not without power. I can walk upon the water... perhaps not so fast as a great witch-warrior, but fast enough.
...
Ahaz wore that amulet, Sanit-Kil's Heart of Fire. Ahaz had it from his father, and Ahaz's father had it from Kinitu Nila, and Kinitu Nila had it from Sanit-Kil, a great witch-warrior.
So witch-warriors exist not only in Skyrim. And maybe they are similar to mabrigash there.
Maybe there are some cultural influence on nords and dumners to each other...
By the way, interesting view on nordic weapons of Mark Jones from his site:
The etching on the weapons was, in my mind, something like a history of the weapon and its owners. I envisioned that the weapon would be passed down through the family, and the heroic deeds carried out with it would be etched into the metal after each battle If you look closely there's a dragon head in there where the Axe was once used to slay a dragon.