Mers which are strong and don't mind the cold, love adventure, prey to Norse gods, feels it's okay to cut off you husband's junk if he is unfaithful (Viking women really did do this, plus they hung it up outside their house. Did I say that I'm a history nerd?), you think that light elves are dangerous and so on and so on.

I'm pretty sure you don't have to be Scandinavian to be a Viking (English and Irish people have been found to be Vikings, Thorfinn and Leif Erickson had a 'friend' who was English).

So all my Viking mers, come to me and we shall dine as if we were in Valhalla!