Óskar wrote (some days ago):

>No no, not at all :) The dualis is just "vit". Then there is a
>preposition "við". However, later ON has some lenition going on,
>so "vit" > "við"; the latter is the MI and MFarose form, as well as
>the probable ancestor of Scandinavian "vi".

I'm not entirely sure...

MFaroese actually has "vit". I don't know whether the t
is pronounced but they'd probably spell it "við" if it
wasn't (Faroese also has "vær" in poetry.)

I always assumed the Scandinavian "vi" was a descendant
of "vér" rather than "vit" but I don't have any evidence either way.

Vit vilja tevatn og breyð!

Haukur