> I translated Who are you? (you being plural) into:
>
> Thik Heitir
>
> Are being the verb, and Thik being the accusatory plural form of you.
>
> Is this correct?

Not quite. Here are the problems.

1. The form 'þik' is indeed accusative - however
the nominative is called for here (the verbs 'vera'
and 'heita' take a nominative complement, not an
accusative object).

2. The form 'þik' is not plural, it is singular.

3. The form 'heitir' is not plural second person,
it is singular third person.

4. The question word is missing.

Kveðja,
Haukur