Makes you wonder where the names come from though. Are there swans near the sea in Swansea? It seems to do with Scandinavian and Norse history. Have a look at this aromulus.
http://www.bbc.co.uk/wales/whatsinan...es/intro.shtml
Example: Mold??
The English name for this town comes from the French, mont (hill) and hault (high).
The high hill is the Bailey Hill near the centre of Mold on which the Normans built a castle, a dominant feature of the town's landscape.
There is a parallel between the meaning of the Norman French, Mold, and the Welsh name, Yr Wyddgrug.