If you go to the Wikipedia entry for "Uccle" (the town in Belgium), click on the speaker symbol, and listen, is the pronunciation Ick-ul or Uck-ul? I can't tell for sure with my computer's speakers. And then do we actually say, "duckles" or "dickles" if we want to say d'Uccle in Dutch? Where did the current pronunciation that seems prevalent of "dew-clay" come from? It doesn't look like it's French because, if you're still at Wikipedia, the phonetic symbols for the French pronunciation don't correlate to "dew-clay."