Just read through this, and found it interesting, so I'll add my own little tuppence.

One of my favourite places, when it comes to looking at Toponomy has to be "Torpenhow Hill" in England.
This name, as I understand it, basically means "Hillhillhill Hill"; "Tor", "pen", and "how" all meaning hill in different languages (Old English, Welsh and Danish I think) - I guess it goes to show, that when a new power arise in a region they may use old toponomy, but add to it themselves. And I find that rather interesting.