[Amorphous]

Well, some of the words have been used slightly differently over time and in different areas, but they are all from the Nordic culture.

Gode - essentially a priest of the Aesir
Herse - a chieftain
Van - this prefix is taken from the other (not the Aesir) family of gods called the Vanir.
Skratti - wizard


Hope that helped.

Edit:
A bit late, I see.

And now that I am at it, I might as well mention that 'Skratti' may mean troll as well.