[Nerwen]

Originally Posted by Zigûr

Could they perhaps be interpolated to some extent from the Adûnaic where an existing Westron word could not be found?
These pages might be helpful, they have a decent collection of known words in various vocabularies:
http://folk.uib.no/hnohf/westron.htm
http://folk.uib.no/hnohf/adunaic.htm

I gather the OP isn't looking for actual Westron, just names that won't sound out of place.