IDK, I think it's just inconsistent spelling. Dverger is modern Norwegian (I think), and I am pretty sure Dvergr is old Norse.

The more e's you can drop from the word, the more ancient it begins to sound. ;)

Dvrgr

Ah ys, back in ancint tims whn th Vikings invntd nglish, thy didn't hav that particular lttr. It wasn't until latr, whn the nglish appropriatd nglish from the Vikings bcaus it had th sam nam as thm, that thy incorporatd the E, ande thenne, theye loved itte so muche thatte theye added itte to the ende of almoste everye worde, sometimes withe anne accompanying double consonante to protecte the preceding vowelle sounde.

Originally posted by Luminous Dark:

Ah ys, back in ancint tims whn th Vikings invntd nglish, thy didn't hav that particular lttr. It wasn't until latr, whn the nglish appropriatd nglish from the Vikings bcaus it had th sam nam as thm, that thy incorporatd the E, ande thenne, theye loved itte so muche thatte theye added itte to the ende of almoste everye worde, sometimes withe anne accompanying double consonante to protecte the preceding vowelle sounde.