"llama_nom" wrote:

> The name is generally believed to refer to the Carpathian Mountains.
> 'Harvaða' is thought to derive from a form of the name inherited
> from Proto-Germanic [...]

This is too much of a guess. Before deriving any etymology it would
be good to find the reliable form of the word.
Various editions and MSS read Hæruaða and even Hávaða.