Earlier quoted context omitted.
That's not an English name. It's the name of a spanish river. Wad is river in Arabic. They pronounce it correctly. It's common that foreign words are adopted and adapted to the host language, but sometimes, specially if they're names, the original pronounciation lingers.
I did not know it was a river in Spain, coming from the US I had always assumed it was some catholic religious phrase or a mispronunciation of a native word. It makes me cringe to imagine people saying "GWAD-uh-LOOP" but I guess its not even that bad compared to many mispronunciations
What's the better/closer-to-original pronunciation?