Many struggle with even the simple place names ... Rowen becomes Rowan (as in the tree), Llandudno is usually clan-dud-know and Betws-y-Coed bcomes Betsy-code. I was once asked how to get to Routine - turned out they meant Ruthin. I'm sure you can come up with many more.
It does puzzle me how TV and radio presenters have no problem with the likes of Leicester, Gloucester, Carlisle and High Wycombe but totally fail when it's a place in Wales.