I didn't know that about Kuala Lumpur! But (having dealt a lot with medieval place names) it is amazing how many places there are called something like New Port/Castle/Market - so I very much like the idea of a place that would have an 'exotic' sounding name like Adanek of Kassin, which could then be revealed to mean something quite prosaic. The only problem is that you would have to do that for all the places, so you would have to give a Telaka version of Dry Rivers as well. And I do like Deep Water (in Telaka, of course)!

All this naming sounds fun. Hope you are enjoying it!